Cross-Spectrum Microphone Calibration Service - USA - Page 13 - Home Theater Forum and Systems - HomeTheaterShack.com

Reply
 
Thread Tools
post #121 of 368 Old 03-24-11, 01:45 PM
Senior Shackster
Anechoic
 
Join Date: Jan 2009
Location: Springfield, MA
Posts: 397
Re: Cross-Spectrum Microphone Calibration Service - USA

Quote:
pepar wrote: View Post
What would make one choose the Dayton over the Behringer, or vice versa?
Behringer: higher quality accessories (case, mic clip), lower output impedance so it will be easier for low-quality pre-amps to drive.

Dayton: generally flatter response, lower noise floor, better unit-to-unit consistency.

IMO, as long as you have a decent quality pre-amp, the Dayton wins.
Anechoic is offline  
Sponsored Links
Advertisement
 
post #122 of 368 Old 03-24-11, 02:37 PM
Senior Shackster
 
pepar's Avatar
pepar
 
Join Date: May 2006
Location: On an island
Posts: 108
Re: Cross-Spectrum Microphone Calibration Service - USA

Quote:
Anechoic wrote: View Post
Behringer: higher quality accessories (case, mic clip), lower output impedance so it will be easier for low-quality pre-amps to drive.

Dayton: generally flatter response, lower noise floor, better unit-to-unit consistency.

IMO, as long as you have a decent quality pre-amp, the Dayton wins.
Thanks. I have a browser tab open now on my PayPal account.

And thanks for extending the discount!

Jeff


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
is a neverending story!


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
pepar is offline  
post #123 of 368 Old 04-01-11, 12:22 AM
Senior Shackster
Anechoic
 
Join Date: Jan 2009
Location: Springfield, MA
Posts: 397
Re: Cross-Spectrum Microphone Calibration Service - USA

Reason # 5009 why you should never trust an out-of-the box ECM8000 for critical measurements:



I'm selling this mic as a Premium+ for $65 since I can't bring myself to charge full price for this.

HTS members will get $5 off, leave your username in the "message to seller" box on the PayPal checkout page and I'll refund the $5.
Anechoic is offline  
 
post #124 of 368 Old 04-08-11, 12:05 AM
Senior Shackster
Anechoic
 
Join Date: Jan 2009
Location: Springfield, MA
Posts: 397
Re: Cross-Spectrum Microphone Calibration Service - USA

Hey all,

I do have a small bit of bad news: my costs have have been going up over the last 10 months or so - the wholesale prices for both the Behringer and Dayton mics have increased and there was an increase in USPS shipping rates back in January. I ate the costs, but with some other costs increasing, I am going to have to raise my calibrated mic pricing. The plan is to raise prices by $5 across the board for all my mics (but not the meter).

Two bits of good news: one, I'm going to wait until late May/early June to raise the prices. I'm announcing the increase early because I know that as a consumer myself, I hate when prices unexpectedly rise overnight, so as a believer in the "do unto others" mantra I am extending a courtesy that I would like to see vendors extend to me.

The second bit of good news: I've been offering a $5 discount for HTS members on the Dayton mics and I've occasionally offered discounts on the Behringer mics. I will carry the discount forward for the Dayton mics and I will offer a permanent $5 discount for HTS members on the Behringer mics as well, so in effect HTS members won't see a price increase for those mics.

Thanks guys, I appreciate the business and I appreciate HTS for giving me the opportunity to share.
Anechoic is offline  
post #125 of 368 Old 04-09-11, 11:35 AM
Senior Shackster
Michael
 
Join Date: Jul 2008
Posts: 142
Re: Cross-Spectrum Microphone Calibration Service - USA

Hello

I have ECM8000 stock unit and I would like to upgrade it to some much better, say beyond 1db precision within 15Hz-25Khz.. I got a warm recommendation for the calibrated Dayton EMM-6

1) I do not see the specification though, is it really 1db precision?
2) It is possible to buy the mic here: http://www.parts-express.com/pe/show...number=390-801 for 48$, and then download the calibration file free of charge. Where is the difference .. from the Basic calibration?
3) I do not understand the application of different measurements (Basic+, Premium, Premium+) to Room EQWizard. How REW is going to use the calibration files? E.g. is it going to influence phase measurements, waterfalls in REW? How?
4) I have Tascam US-122, I hope it is still good for Dayton..

thanks,
Michael
michael123 is offline  
post #126 of 368 Old 04-09-11, 11:51 AM
Senior Shackster
 
pepar's Avatar
pepar
 
Join Date: May 2006
Location: On an island
Posts: 108
Re: Cross-Spectrum Microphone Calibration Service - USA

Quote:
michael123 wrote: View Post
Hello

I have ECM8000 stock unit and I would like to upgrade it to some much better, say beyond 1db precision within 15Hz-25Khz.. I got a warm recommendation for the calibrated Dayton EMM-6

1) I do not see the specification though, is it really 1db precision?
2) It is possible to buy the mic here: http://www.parts-express.com/pe/show...number=390-801 for 48$, and then download the calibration file free of charge. Where is the difference .. from the Basic calibration?
3) I do not understand the application of different measurements (Basic+, Premium, Premium+) to Room EQWizard. How REW is going to use the calibration files? E.g. is it going to influence phase measurements, waterfalls in REW? How?
4) I have Tascam US-122, I hope it is still good for Dayton..

thanks,
Michael
Not Herb, but the "precision" comes from the calibration that he does, i.e. the precision is in the calibration file that he generates in that it precisely (within the stated tolerance) matches the response of the mic.

I have the Tascam, too, and just bought the Dayton Basic +. That level gives you calibration files for 0, 45 and 90 degrees. Zero and 90 are likely to be the only two that you use.

Jeff


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
is a neverending story!


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
pepar is offline  
post #127 of 368 Old 04-09-11, 11:55 AM
Senior Shackster
Michael
 
Join Date: Jul 2008
Posts: 142
Re: Cross-Spectrum Microphone Calibration Service - USA

Thanks,
I understand.

I see yet that the .CAL files are different from the .FRD as they do not have the phase information.
Does it mean that going beyond Basic has no effect?

Also, what is the difference between this and the personal calibration Daytone gives away now (for free)?
michael123 is offline  
post #128 of 368 Old 04-09-11, 12:03 PM
Senior Shackster
Anechoic
 
Join Date: Jan 2009
Location: Springfield, MA
Posts: 397
Re: Cross-Spectrum Microphone Calibration Service - USA

Quote:
michael123 wrote: View Post
Hello

I have ECM8000 stock unit and I would like to upgrade it to some much better, say beyond 1db precision within 15Hz-25Khz.. I got a warm recommendation for the calibrated Dayton EMM-6

1) I do not see the specification though, is it really 1db precision?
If you mean 1 dB precision out-of-the-box without the use of a calibration file, you might get lucky and get an EMM-6 (or ECM8000) that flat, but it's been months since I've seen a Dayton (and years since I've seen a Behringer) with that kind of accuracy. There's a reason why pro mics from Earthworks, ACO Pacific, Bruel & Kjaer et all (which do have guaranteed +/- 1 dB or better accuracy) cost so much.

Now with a calibration file, yes, you can get accuracy in that ballpark.


Quote:
2) It is possible to buy the mic here: http://www.parts-express.com/pe/show...number=390-801 for 48$, and then download the calibration file free of charge. Where is the difference .. from the Basic calibration?
There are two differences between the stock Dayton units and the calibration Daytons I sell:

1) The stock Dayton correction curve bandwidth is 20 Hz to 20 kHz, while my mics are calibrated from 5 Hz to 25 kHz.

2) I believe that my correction curves are more accurate than the stock curves (I have written up my procedures and some comparisons between my measurement results and the results generated by NIST-traceable labs in other threads).

That said, the stock Dayton curves are certainly in the ballpark, so if all you need is 20 Hz to 20 kHz data for the lowest price, I would recommend just buying the stock Dayton straight from PE.

Quote:
3) I do not understand the application of different measurements (Basic+, Premium, Premium+) to Room EQWizard. How REW is going to use the calibration files? E.g. is it going to influence phase measurements, waterfalls in REW? How?
Although both the EMM-6 and ECM8000 mics are marketed as "omnidirectional" microphones, they are only omnidirectional up to around 1-2 kHz. Above that, the frequency response of the mics will depend on the orientation of the mic with respect to the sound source (in particular the mics become less sensitive to higher frequencies as the mic is pointed away from the source). If you want to use the mic for loudspeaker measurements (where the mic is usually pointed directly at the speaker) or for low-frequency measurements (where the mics are truly omnidirectional) than the non-plus mics will work fine.

However in room acoustics applications where the mic is picking up sound waves that are bouncing off the walls/ceiling/floor and arriving at the mic in arbitrary directions, the additional frequency response correction curves allow the user greater flexibility in using the mics. For room-correction/room acoustics applications, I typically recommend pointing the microphone straight up at the ceiling (with a slight tilt toward the main speakers) and using the 90-degree correction curve.

Quote:
4) I have Tascam US-122, I hope it is still good for Dayton..
The Tascam will be fine.
Anechoic is offline  
post #129 of 368 Old 04-09-11, 12:28 PM
Senior Shackster
Michael
 
Join Date: Jul 2008
Posts: 142
Re: Cross-Spectrum Microphone Calibration Service - USA

thanks!
I just sent you a payment
michael123 is offline  
post #130 of 368 Old 04-09-11, 12:46 PM
Senior Shackster
Anechoic
 
Join Date: Jan 2009
Location: Springfield, MA
Posts: 397
Re: Cross-Spectrum Microphone Calibration Service - USA

Yep, I got the order. It will ship on Monday.
Anechoic is offline  
Reply

Bookmarks

Tags
calibration , cross-spectrum , microphone , service

Quick Reply
Message:
Options

Register Now




PLEASE COMPLETE ALL REQUIRED FIELDS BELOW... THANKS!

REQUIRED FIELDS ON THIS PAGE
YOU MUST COMPLETE ALL OF THESE

Username
Password
Confirm Password
Email Address
Confirm Email Address
Random Question
Random Question #2




User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
PLEASE READ BELOW PRIOR TO ENTERING AN EMAIL ADDRESS!

ATTENTION!

YOU MUST ACTIVATE YOUR ACCOUNT!

Activation requires you reply to an email we will send you after you register... if you do not reply to this email, you will not be able to view certain areas of the forum or certain images... nor will you be able download software.

AN INVALID EMAIL ADDRESS WILL CAUSE YOUR ACCOUNT TO BE DELETED!

See our banned email list here: Banned Email List

We DO NOT respond to spamcop, boxtrapper and spamblocker emails... please add @hometheatershack DOT com to your whitelist prior to registering or you will get nowhere on your registration.


Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML is not allowed!
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


For the best viewing experience please update your browser to Google Chrome