Computer Memory Frequency Equalizer / Analyser
The BSR model 4000XR combines a microprocessor-controlled 12-band equalizer, a real-time analyzer, a pink-noise generator, and a sound pressure-level meter into one handsomely styled unit (and it comes with a calibrated microphone).
Since operation is electronic, a computerized memory system has been incorporated so up to four equalizer settings can be memorized.
Some of the advanced features of the model 4000XR include:
Large fluorescent multi-function display
Flat-surface, illuminated, soft-touch control keys instead of traditional press switches
A sharp and inaudible infrasonic filter.
Remote control capability including a wireless infrared remote control transmitter that duplicates almost all control functions of the model 4000XR
Input Sensitivity: 5V (max)
Output Level: 5V (max)
Gain: ± 1dB
Frequency response: 5Hz to 100kHz
Signal to Noise Ratio: 100dB
Total harmonic distortion: 0.008%
Control Range: ± 12dB
Frequency Bands: 25, 40, 63, 100, 160, 250, 500, 1K, 2K, 4K, 8K, 16KHz
Dimensions: 435 x 88 x 302mm
Accessories: remote control, microphone
If you have any problems opening files please read the download FAQ. All files are provided under strict licence and reproduction without prior permission or for financial gain is strictly prohibited.
If you have additional documentation please consider donating a copy to our free archive.
Reviewed Jan 12th, 2015 by RTM
Judging by Ebay prices, I'd say the secret is out now about this surprise uppercut to the never-all-that-over-distinguished-realm of high quality EQ's. It gives all indications of being (despite its mail order provenance-if the name DAK Industries means anything, you'll know what I mean) an only slightly streamlined version of the same company's (DBX and BSR were the same company at the time, as was ADC) hideously expensive DBX 20/20. It actually outperforms the specs of the 20/20 in some ways. It is also an approximate equivalent of the very fine ADC 525x. Of the bunch, the EQ-4000XR was, by FAR the best audio component that was ever sold by DAK, followed closely by its also very fine EQ-3000. If you're looking for an EQ and don't need 1/3 octave capabilities across the spectrum, this is THE one to own. There was a Pioneer that was about as quiet (SG-9500/9800) and not too many others (short of something like the Cello Audio Pallete, which can't compete on a cost/benefit analysis) that had this much bang for the buck. I own three, and they've all held up. The only quirk that I've found is the bulb behind the BSR trademark lens. I own three and two have burned out. It is not easy to find a good substitute. After a time, I just let the bulb stay burned out on those two. The Schematic should show what voltage bulb should work. I just never got around to it, because the Fluorescent display serves the same function.
Reviewed Feb 12th, 2014 by mrstan
This is a spectacular looking equalizer and gives great control of the frequencies as well. With an LED level meter for each frequency and left-right selectable.. it just looks sophisticated and greatly improves the sound landscape... Best add-on that I ever bought for my stereo...