Sennheiser HD 280 Pro

Can CAD’s Cool Colored Cans Cope with VO?

by Paul Strikwerda in Articles, Gear, Studio 11 Comments

Over the years, people have commented that I have a good head on my shoulders, and they’re right. In fact, I’m rather bigheaded.

I’m also blessed with sizable ears that turn bright red when it’s hot or cold outside. And because they continue to grow as I age, there will come a time that I’ll be all ears. When that happens, I shall probably take up sailing.

My big head never really bothered me until I had to select a pair of headphones for my voice-over work. When I’m recording I prefer not to wear them (it takes me out of the moment), but when I’m doing detailed editing, I use them for hours in a row.


Searching for the perfect cans was quite an education. Just as with microphones, not everybody has the facts, but most people have an opinion:

“You must buy the Beyerdynamic DT770. They’re great.”

“Get the Sony MDR7506. Everybody in the business is using them.”

“The Sennheiser HD-280 PRO is the industry standard.”

I’m always interested in what others have to say, but I also know that what works for one person, doesn’t necessarily work for me. Part of that has to do with our individual anatomy.

All ears hear differently, and you and I may have different tastes of what sounds good. If you love listening to classical music, you probably want headphones designed for audiophiles. I needed cans that would allow me to accurately pick up breaths, mouth noises and other unwanted sounds. I wasn’t going to use them to listen to the Berliner Philharmoniker or to mix the latest Rap album. I wasn’t even going to listen in stereo!


When comparing headphones, you’ll find that many brands display a total lack of modesty. They describe their products as “world-class,” “revolutionary” and “exceptionally accurate.” While much of this lingo is just marketing hype, there are a few terms that come back again and again. Let’s take a quick look at them.

Open versus Closed

Open Headphones are designed to allow some outside noise to come in. Closed or sealed headphones isolate your ears from ambient noise. Open headphones tend to be lighter; they put less pressure on the ears, so they’re usually more comfortable. They also produce a more “open” sound, a bit more like your studio monitors. 

Closed headphones produce a more “inside the head” sound, and they’re often used in music production where critical listening is vital and outside noise should stay out of the mix.

If I were to were to use my headphones to listen to music on the train, the bus or in bed, I’d go for closed ones, so as not to bother other people. In my studio, that’s not an issue. Because I work in a very quiet environment, isolation from ambient noise is not so important either. Comfort, on the other hand, is.

My favorite pair of cans share a feature with my mind: they’re semi-open.

Frequency Response

Sound is measured in terms of frequency. Frequency response refers to the range of bass, mids and treble (highs). Let’s say the range of a pair of headphones is 15 to 25,000 Hz. What does that tell you? Well, the first number represents the bass end of the spectrum and the second number the treble end. One of the headphones I was looking at, had a range of 15 to 25 kHz. Is that any good?

Sennheiser HD280 Pro, Beyerdynamic DT770, Sony MDR-7506 & AKG K240 MK II

The audible frequency range for human beings is about 20 Hz to 20,000 Hz. Below 20 Hz, the bass frequencies are more felt than heard, but loudspeakers are much better at delivering that punch. Frequencies over 20 kHz aren’t always audible.

Because of the limitations of the human ear, a wider frequency range doesn’t necessarily lead to better sound quality. So, don’t be fooled by the numbers.

With some headphones and loudspeakers, certain frequencies are exaggerated and others are attenuated (reduced). Because headphones don’t give you the physical oomph that sound waves from a room speaker have, some makers of headphones overcompensate and build in a hyped bass response.

When listening to your voice track on these types of cans, it sounds like you’ve recorded too closely to the microphone (proximity effect). The flatter the audio response, the more accurately it reproduces the sound from the input source. Those headphones are best suitable for voice-overs.


The impedance of a headphone (measured in Ohms) refers to the headphones’ ability to resist electricity. Here’s what you should know: The lower the impedance of the headphone, the easier it is to get higher volume. Higher impedance doesn’t necessarily mean higher quality.

The higher the impedance, the more power your headphones will require. If you’d plug a high impedance headphone (e.g. 600 Ohms) into an iPhone or MP3 player, you’d definitely notice a loss in quality because the drivers can’t handle it. That’s why those models usually need an amplifier to drive the speakers inside the headphones.

Some manufacturers make different impedances for the same model (the Beyerdynamic DT880 comes in three ratings: 32 Ohms, 250 Ohms, and 600 Ohms), so be sure to look at the specs before you place your order.


Another factor influencing the loudness of the headphones is the sensitivity. Impedance determines how much power the headphones will draw, while sensitivity indicates how much of the electrical signal delivered to the headphones is converted into sound. This is measured in decibels of Sound Pressure Level per milliwatt, or dB SPL/mW.

Headphones of a higher sensitivity (and with high impedance) will sound louder than those of lower sensitivity. Be aware that the human ear may experience hearing loss if sound is sustained above 85 dB. So, if your cans are more sensitive than that, be extra careful.

Comfort and Fit

Even the best studio headphones would be pretty useless if they don’t fit right. When it comes to fit, manufacturers use fancy words to describe the two main types of studio cans:

Supra-aural headphones like the Koss porta pro, rest against the outer ear. The ear pieces can be flat pads against the ear, but can also be shallow bowl-shaped, or deeper ear cups that are too small to completely surround the ear.

Koss porta pro supra-aural headphones

Circumaural headphones like the Sony MDRXB700, have ear pads that completely surround the ear, and ear cups that completely enclose the ear.

Professional audio reviewers recommend wearing headphones for at least fifteen minutes when you test them for comfort. I’m not sure I agree. If they’re not comfortable, I can tell within seconds. Keeping them on for an extra ten minutes is not going to change that.

This is what you should ask yourself: Do the earpads exert too much pressure on the ears? Can the headband be easily adjusted? Remember that headphones that enclose or cover your ears can get uncomfortably hot. To find out, you do have to wear them for a while.

Sony MDRXB700 circumaural headphones

There’s one other thing I pay attention to: the cord. I happen to hate coiled cords. They tend to be heavier and there’s always something that gets caught in them. I also prefer the cord to be detachable from the headset, in case I need to replace it. Every studio engineer I know has messed up some cords by rolling over them with their chair. Cheaper headphones usually don’t come with a detachable cable.


You probably remember that I’m a big fan of the CAD Audio E100S microphone. Voice-over colleagues are finally catching on to this amazing, affordable mic. This American company has a lot more to offer, though. CAD recently came out with the Sessions” MH510 studio headphones, and asked me to give them a try. Would these be just as good as the E100S?

Before I share my impressions with you, you should know that I’ll judge them based on my needs as a (bigheaded) voice-over artist only. Secondly, I’ll compare them to the reasonably priced cans I have used for the past three years: the AKG K240 Studio headphones that are quite popular in my field. You can buy both the CAD and the AKG for around $99.

First off: this CAD offers more than cans. The MH510 headphones are a fashion statement. It comes in few colors: red/white, black/orange, black/chrome and pure black. Each pair of headphones comes with two detachable cables (coiled and straight) and two sets of earpads (leatherette & velveteen), as well as an 1/4″ adapter and a carrying bag.

Compared to the light-framed, self-adjustable AKG K240, the MH501 is rather bulky. There’s a lot of rubberized plastic and the leather headband is thick and cushy. The AKG weighs 8 ¼ ounces (235 g) and the CAD comes in at 11 ¼ oz. (320 g). During longer sessions, the weight of the CAD began to bother me.

AKG K240 Studio & CAD MH510

With the MH510, CAD wanted to make isolating headphones that “virtually eliminated bleed into the playback environment.” In order to do that, the earpads firmly push against the ears. CAD has reached its objective because these headphones isolate really well. However, the price you pay is comfort. My ears did not enjoy the sustained pressure. The K240 Studio headphones, on the other hand, fitted like a glove. The semi-open design offers less isolation, but there’s also much less pressure to keep the earpads in place.


And what about the sound? Would CAD’s Sessions headphones be suitable for the simple, subtle sound of voice-over?

The AKG has an impedance of 55 Ohms and a sensitivity of 91 dB. The CAD has an impedance of 26 Ohms and a sensitivity of 103 dB. Remembering what I wrote above, this should tell you that the CAD cans are definitely louder. You don’t need to turn the volume up that much, in order to get a solid sound. CAD calls the sound pressure level “rivaling a concert experience.”

If you’d like to relive your experience at a Tiësto dance party, perhaps that’s exactly what you’re looking for in a pair of headphones. As a voice talent, I want detail. Not volume. Besides, volume can be dangerous! It can lead to hearing loss.

In terms of frequency response, the MH510 can be characterized by what CAD calls “extended lows”. One Amazon-reviewer described the bass as “intense”. I wouldn’t go that far, but the low is definitely overemphasized. For certain types of music this might be just what the doctor ordered, but not for voice-over. To me, the extended lows just made my voice recordings sound muddy.

In contrast, the K240 Studio headphones are open, airy, natural and neutral. The spoken word has a realistic, uncolored clarity to it. The best way to illustrate this is by sharing an audio sample with you.

I placed my microphone in between the earpads of both headphones, and I played one of my voice-over tracks. Of course a condenser microphone can never replace the human ear, but this will give you some idea of the difference in sound coming from both headphones. You’ll notice that I alternate between the AKG and the CAD. The K240 Studio headphones are the first ones you’ll hear.



What I’ve done in this review is unfair and unscientific. Yes, both the CAD MH510 and the AKG K240 are sold as studio headphones, but comparing one to the other is a bit like comparing heavy-duty hiking boots to running shoes. Both are footwear but made for a different purpose. It might have been better to compare the K240 to CAD’s MH310 cans, which look remarkably similar.

I don’t think CAD had voice-over applications in mind when they designed the MH510. That’s where the AKG shines.

The CAD is more geared toward tracking, mixing and mastering of pop music in a recording studio. If you don’t want to have a scratch-track/click bleed through, the closed CAD is the better choice.

Secondly, reading reviews can tell you a lot about the personal preferences of the author, preferences which you don’t necessarily have to share.

And then there’s the size of my head. We must take that into account. 

It’s only fitting…

Paul Strikwerda ©nethervoice

PS CAD Audio kindly sent me a pair of MH510’s for evaluation purposes.

PPS Interested in headphone reviews? Here are a few websites I researched as I was writing this article:

More Studio Secrets Revealed

by Paul Strikwerda in Articles, Gear, Studio 25 Comments

You’ve seen the inside of my voice-over booth. Now it’s time to talk about technology.

Don’t worry, I’ll do my very best not to be too technical, if only for my own sake.

When it comes to the tools of the trade, I subscribe to the “less is more” philosophy. Life is complicated as is, and in my studio I’d like to keep things as simple as possible. 

Without exception, my clients ask for audio that’s “unfooled around with”. Most of them are much better equipped to do post-production sweetening in their studios, if that’s what they want.

I have no inclination to compete with all the high-end bells and whistles their engineers have at their disposal. As long as I can give them clean and clear audio, they’re happy and I’m happy.

Mac MiniComputing Power: the hardware

At the heart of my studio is a Mac Mini with a dual-core 2.3 GHz Intel i5 processor running OS X Lion. It came with 2GB of memory, but thanks to a removable bottom, it is very easy to add more memory to your mini. If you let Apple do it for you, 8 GB will cost you $400. It took me ten minutes to do it myself for less than $45. At the time I even got a $10 rebate and free shipping!

Sorry, but I’m not going to get into the Apple versus PC discussion. I’ve used both and I have found Apple to be more reliable and user-friendly. I do want to tell you what prompted me to get a Mac Mini.

Reason number one: it barely makes any noise. When it does, it produces a whisper that’s almost inaudible.

Some colleagues have a studio with two separate areas: a sound booth and a control room. The computer is usually outside the booth. I combined both spaces, which means that my desktop sits next to me in my studio. The Mac Mini uses very little energy and it rarely ever gets warm. That makes it amazingly quiet.

Secondly, this computer stays in my studio. It doesn’t have to go on the road with me. Otherwise I would have bought the Macbook Air (no moving parts and also nearly silent).

Third: I already had peripherals such as a flat-screen monitor and an ergonomic mouse. I just added a wireless keyboard. Tip: if you want to connect a standard analog computer monitor or LCD to your Mac Mini, you need a Mini DisplayPort to VGA Adapter.

What the Mac Mini doesn’t have is an optical drive to play and burn CD’s or DVD’s. For that purpose I bought the Macbook Air SuperDrive which can be plugged into one of the four Mac Mini USB 2.0 ports.

The actual move from PC to Mac was very easy. It took me about a week to get used to my new computer and the operating system. It’s all rather intuitive. A few weeks ago we did add a MacBook Air to our household. This is no ordinary laptop. It is a work of art!

Apple Time CapsuleBackup, please!

We’ve all heard horror stories of friends who lost months if not years worth of irreplaceable data when their system decided to take a permanent break. Backing up is something all of us should do, but we often don’t. We forget. We tell ourselves that we’ll do it tomorrow or the day after. It’s just one more thing to think about, and that’s why I wanted a backup system that would do the thinking for me.

I now have an Apple Time Capsule with a 2 TB hard drive, designed to work with my operating system (although it works with PC’s too). After an initial backup which lasted several hours, it now backs up both computers in our home quickly, wirelessly and automatically. Installing it was a piece of cake. The Time Machine feature in the OS detected the Time Capsule and within minutes it was up and running.

Tip: as the Time Capsule is backing up, it may interfere with your recording. In my case, I noticed a soft but annoying buzzing sound on the audio file, which disappears when the automatic back-up is switched off.

Look at me!

Next on my list was a webcam which I use for coaching sessions, webinars and Skype. I picked the Logitech HD Pro Webcam C910. The Carl Zeiss optics lens has a wide angle and the video quality is remarkably crisp and clear.

Reviewers also praise the quality of the stereo microphones. That’s not so important to me because my sound comes directly from my studio condenser.

Mac users: don’t get all gaga over all the advanced features listed on the box and in the manual (zoom, face tracking, exposure adjustments). Even though Apple sells this camera in their stores, most of the Logitech functionally works on a PC and not on a Mac. The C910 is also not supported as an iMovie camera, but that’s Apple’s fault.

In summary, this camera gets an A for image quality, but a C- for limited Apple functionality.


There are many different types of DAW’s (Digital Audio Workstations) available for audio production on a Mac. Colleagues with a background in audio engineering like to use Pro Tools. A lot of my voice-overs friends rave about Adobe Audition CS5.5 and Twisted Wave. Until I made the switch, I was a happy Sound Forge™ Pro user.

I won’t be going over the pros and cons of each program. You can try most of them out for free and I’d certainly take advantage of that.

I ended up choosing Twisted Wave because it’s very stable, easy to use and at $79.90 it’s also budget-friendly. Thanks to a great interface, zooming in and out of a waveform is very fast, even when the file is quite long. I particularly like the fact that I can zoom in at great detail for precision editing.

Different clients prefer different audio formats and TW can import, export and convert most of them. It has a time-saving batch processing feature which is especially useful when you’re working on a lengthy e-Learning project with lots of short files that need to be separated out and individually named.

TW doesn’t come with a whole lot of special effects, but new and existing plugins are imported seamlessly. With TW, effects no longer have to be applied one by one, but it’s possible to load any number in an effect stack and still adjust them separately.

Some of you might prefer Adobe Audition CS5.5 because it’s loaded with features such as Noise Reduction, a DeClicker, a DeHummer etcetera. I had already invested in Izotope’s RX2 audio repair toolkit and it’s now an integral part of my Twisted Wave Effects line-up.

I do have two items on my Twisted Wave wish list. I’d love to have a feature similar to Adobe Audition’s Auto Heal function for brushing away audio glitches. It’s like having Photoshop® for your audio! I also like to have my Sound Forge WaveHammer tool back. It applies a tad of compression and normalization to the sound files to give the audio just a bit more oomph.

Controlling the Wave

To streamline my job in the editing room I’m using a ShuttlePROv2 controller. It has 15 programmable buttons, a jog knob and a spring loaded wheel with which I can control the main editing functions in Twisted Wave.

It’s preprogrammed for things like Garageband, iPhoto and iTunes, but it was really easy to program the TW keyboard shortcuts into the Shuttle. With my mouse in one hand and my ShuttlePRO in the other, I can scroll, zoom, cut, copy and paste much faster than with a keyboard.

The ShuttlePROv2 connects to your computer via a USB port and it comes with custom labels for the top 9 buttons. It can be used on either MAC or PC computers and it retails for about $80.

Gefell M 930 Ts & Rycote's InVision™ Studio KitMicrophone and shock mount

If you’re a regular reader of this blog, you know that I consider myself to be a very lucky man. In December 2011, I won a Microtech Gefell M 930 Ts large diaphragm condenser microphone in a giveaway. This microphone happens to be ideal for voice-over work. To find out why, you should read my review by clicking here.

Because the Gefell did not come with a shock mount, I had to find a suspension system that would hold this small microphone. Rycote, a company based in the UK, makes the InVision™ Studio Kit you see in the picture ($149.99). It’s a combination of a unique, universal shock mount and a very light and effective pop filter. If you click here, you’ll find out what I think of this kit.

I’m using an Ultimate Support® mic stand and their telescoping Ulti-Boom. WindTech cable clips keep the mic cable separate from the stand.


A good preamplifier strengthens the low level signal coming from your microphone to a level suitable for recording, without degrading the signal to noise ratio (S/N). A preamp with a high S/N has very little background noise.

Some boutique preamplifiers can really color your sound and that wasn’t something I was particularly interested in. My ideal preamp needed to be dead quiet, transparent, detailed and clear in all frequencies.

Grace Design M101As I researched preamps within my budget range, I kept coming back to one model: the Grace Design m101.

Built in Colorado, the sound quality is often described as “natural” and “pristine”. I couldn’t agree more. This is a phenomenal preamplifier!

Looking at the front panel, you’ll see a 48V phantom power button, a ‘ribbon button’ which, when engaged, bypasses the phantom power circuit, and a high-pass filter button to reduce low-end rumble and curb the proximity effect of a microphone.

In my review for pro audio dealer Sweetwater, I called this preamp an “Amazing Grace” because it makes my microphone shine.

Audio Interface

In a nutshell, an audio interface connects your microphone and other sound sources to your computer. For audio to be usable by a computer it needs to be digital, and an interface converts your analog signal to bits and bytes. You’ll often find external audio interfaces that include a mic preamp, but since I already had a pre, I opted for the pocket-sized Echo AudioFire2 (discontinued, but still available for around $200).

Echo AudioFire2This device is connected to and powered by the computer via a FireWire bus. I purposely didn’t want to get a USB-interface. The Mac Mini only has four USB slots that fill up pretty quickly and USB devices cannot draw power from the computer. With the AudioFire 2 you can record 24-bit 96 kHz audio with near-zero latency (delay) monitoring.

Because the AudioFire2 has a 400 Mbps FireWire port and the Mac Mini has an 800 Mbps port, you need an adaptor to be able to connect it to the computer. The AudioFire could also use a simple step-by-step  set-up guide. Perhaps it’s my lack of technical insight, but it took me a while to make the right connections (literally and figuratively).

Overall, this sturdy, small metal box performs just fine. It’s more of a necessity than anything else.


Like so many of you, I evaluate my audio in two ways: I use headphones and studio monitors. Gear-guru’s often recommend buying closed headphones to prevent sound leaks from feeding back through the microphone. That’s why I got the Sennheiser HD 280 Pro.

These headphones stay put alright, and they shut outside sounds out (not that ambient noise is a problem in an isolated studio). Over time I found them to be quite uncomfortable. I happen to have a rather large head (thanks Dad!), and I didn’t like the tight grip the Sennheiser had on my ears.

The AKG K 240 semi-open Studio headphones I am using now (also $99), are very comfy and they provide plenty of acoustic isolation. My ears can breathe! After a year and a half, the cups started showing some wear and tear, and I will replace them soon with velvet ear pads.

The AKG has a regular, straight cable which I also prefer. Somehow, things always get caught in a coiled cable, such as the one that comes with the Sennheiser.

Both headphones are excellent for detailed monitoring.

When it came to picking out a pair of speakers a few years ago, my budget was limited and so was my space. At that time I was recording in a cold corner of the attic. For $99 I bought a pair of Alesis M1Active 320USB monitors.

At first I was quite skeptical and I didn’t really expect much from these bookshelf speakers. Once I plugged them in, I was blown away by the fact that so much sound could come out of such a small package. That has not changed.

I’m sure they are no match for a pair of Genelec studio monitors, but for under 100 bucks these Alesis speakers continue to impress me. As you can see, I have placed them on stands at ear hight. It really makes a difference.

Enough already

Alright… I think I’m done shopping for a while, don’t you?

Selecting audio equipment can be a daunting task and it can be a learning experience. Just as a musician has to know his instruments, a voice-over pro has to have a basic knowledge of the tools he or she is using. There’s so much good stuff available these days, and it’s easy to get overwhelmed.

Whatever you do, don’t be intimidated by gear-snobs and audiophiles. Talk to people you trust and whenever possible, try things out for yourself.

Don’t blindly buy something just because some guy at your local Guitar Center told you he loves it, or because Paul Strikwerda wrote about it in his blog.

After all, that’s just a bunch of Double Dutch!

Paul Strikwerda ©2012