Broadband Digital Signal Processor

Broadband Digital Signal Processor


The introduction of the LFR1100 brought about a lot of questions about using a Broadband Digital Signal Processor (DSP) between your pre-amp and your main amp in other speaker models for the purpose of smoothing out small anomalies in the amplitude response. These are referred to as ‘High Q’ corrections to the response curves.

In many ways a speaker’s amplitude response curve could be divided into two Q groups:

  • The Low Q, which deals with amplitude differences over a wide frequency band
  • And the High Q, which deals with amplitude differences within a narrow frequency band.

Audibility of small differences in amplitude over a wide frequency band (Low Q) is very noticeable and needs to be carefully addressed in the design on the speaker. On the other hand, audibility of small differences in amplitude over a narrow frequency band (High Q) is not very audible. The DSP in the LFR1100 already incorporates this High Q correction across the frequency band. Low Q correction is done in using the passive crossover network located inside the cabinet.

In response to all these inquiries we have created a DSP component that is able to do this High Q correction to the VP180, VP160, M80, and M100. The graphs below show the difference in the Listening Window response to an M80v3. Since the correction applied from the DSP is concentrated completely in the High Q group we would recommend this product for the discerning audiophile only as the audibility of this correction will be quite subtle.

The other feature on the DSP for the LFR1100 is the Boundary Switch, which is used to compensate for having your speakers very close to walls or large cabinets. Even though the M80s and M100s are not omnidirectional the proximity to the boundaries still does have an effect in the lower frequencies. For that reason we have included a Boundary Switch on the DSP for these models also which should be experimented with in your room as the effect of the rear wall proximity will vary from room to room.

M80 Frequency Response Curve without DSP
Axiom M80 Speaker Frequency Response Curve without Digital Signal Processing
M80 Frequency Response Curve with DSP
Axiom M80 Speaker Frequency Response Curve with Digital Signal Processing Corrections Applied

If you would like to have your speakers painted to match your walls we can do it. The upcharge is $150 for your entire order for this option.
Call us at 1-888-352-9466 to get all the details

Dimensions H W D (inches) 3.5" x 17.75" x 16.75"
Dimensions H W D (mm) 88 x 450 x 425
Weight (lbs) each 27
Weight (kg) each 12
Digital Conversion 24-bit, Sigma-Delta ADCs and DACs @ 96kHz Sampling Rate
AC Input Voltage 115 or 230
Max Output 2Vrms
Power Consumption 9W (13W for added Centre channel)
RCA Input (Single Ended) Yes
Signal to Noise Ratio (Input shorted, 22Hz-20kHz un-weighted, referenced to full power @8ohms) 102dB (Input shorted, 22Hz-20kHz, un-weighted, Ref. 2V)
THD <0.008% @ 1Vrms
12 Volt Trigger Yes
Voltage Gain Unity
XLR Input (Balanced) Yes

Register your speaker now


Customer Reviews

How do you rate this product? *

1 1 star
2 2 star
3 3 star
4 4 star
5 5 star
  • Reload captcha
  • Broadband Digital Signal Processor