Helix P-DSP and Digital Designs Amps. (2) DD S4's and an M1a

[ricebowl 10+ year member]

Item(s) for Sale:

1. Helix P-DSP 8-channel DSP

2. 2 x Digital Designs S4 4-channel staggered output amps

3. Digital Designs M1a Monoblock subwoofer amp

Item(s) Description/Condition:

 

Everything owned from new and includes original boxes and manuals.

1. As new other than a line in the screening of the word Germany (see pics). Was mounted in a glovebox its whole active life. Updated to latest firmware.

2a. The first amp is 10/10. Appears new.

2b. The second amp had a hex screw head break off on me (got in the way of mounting screw). Doesn't affect anything as there is another screw right next to it that threads into the heatsink. There are a few negligible marks on the bottom (pictured).

3. Appearance is 9.5/10. Two tiny marks on the heatsink. Had a pro repair done by Zed Audio a few years back (repair mute circuit, replace power block - will include repair invoice w/ amp).

Price:

1. $350 shipped CONUS

2a. $300+shipping for perfect amp

2b. $275+shipping for slightly less than perfect amp

3. $200 shipped CONUS

Shipping and Miscellaneous Item Information:

Shipping stated above or local cash sale in Los Angeles. See following thread for feedback: Helix P-DSP, DD Amps, Custom IS300 Kickpanels w/ Morel CDM-54s, MORE TO COME!!!

Feel free to ask any questions!

Item Pictures:

(List pictures in this section, 1st picture should be your username/date if you have less than 10 positive feedbacks with the i-Trader system or less than 10 references that you have sold to in the past. (These must be listed in your signature, or a link provided to a feedback thread listing these references))

Pics and specs in following posts.

Click to read more...

 

[ricebowl 10+ year member]

Helix P-DSP Specs:

**Almost exactly the same as the current model Helix DSP from what I've gathered. Verify the differences if it has any bearing on your purchase decision.**

• DSP settings and adjustmenets made via laptop or PC through USB port
  
• download DSP PC-Tool Software from helixhifi.com
  
• 6 assignable inputs
  
• inputs: 6 RCA preamp, 4 speaker-level, 1 optical SPDIF
  
• 8 preamp outputs (4 volts)
  
• channel settings can be separate or linked together
  
• time alignment in 7 mm increments
  
• 30-band graphic EQ with fine tuning
  
• 1-band parametric EQ
  
• adjustable high- and low-pass filters (20-20,480 Hz)
  
• selectable slopes (6, 12, 18, 24, 30 dB/octave)
  
• selectable filter characteristics
  
  Butterworth: sharp transition, suitable for most applications
  
• Bessel: gradual transition, suitable for smooth speakers, but not subs
  
• Linkwitz: recommended for high-end speakers only, not subs
  
• Chebyshev: very sharp transition, useful as high-pass for tweeters or low-pass for subs
  
• Self-Define: selectable Q-Factor, 12 dB/octave slope only
  

[*]adjustable Q-Factor in Self-Define mode (0.2-2.0) increases signal at crossover point

[*]phase adjustment: switchable 0/180 degrees on front and rear channels, adjustable 0 to 360 degrees on sub channels in 22.5-degree increments

[*]includes 57" USB cable

[*]optional micro SD memory card for saving and applying settings (sold separately)

[*]plug and play input from select factory radios with EPC5 Easy Plug Cable and a Helix vehicle-specific harness (sold separately)

[*]dimensions: 5-15/16"W x 1-11/16"H x 6-15/16"D

 

[ricebowl 10+ year member]

Digital Designs S4 specs:

The S4a is a non-symmetrical output, 4 channel power amplifier. It features two channels with 2 x 100 Watts of power, plus two channels with 2 x 200 watts of power. This allows the amp to make more power where it is needed most. The S4 can be configured to run a variety of systems.

The 100 x 2 channels have 24dB/oct high pass, variable from 20Hz - 500Hz. The crossover also uses a 10x frequency switch, this moves the crossover range to 200Hz to 5kHz. There are 4 calibrated dial markings to help frequency settings.

The 200 x 2 channel has the same 20-5kHz high pass and 50 - 5kHz low pass, 24dB/oct, with 10x frequency multiplier switch. Each filter has individual on/off switches for ultimate flexibility. A clipping indicator circuit is included to monitor real power conditions. The amp uses separate power supplies for each set of channels.

Configurations:

* 200 x 2 to power midrange door speakers with variable band pass, 2 x 100 to tweeters with variable high pass.

* 200 x 2 to power front component set or coax speakers, 2 x 100 to power rear fill.

* 100 x 2 to power front speakers, up to 700 mono to drive rear sub(s).

* 3 channel amp, 200 x 3 for surround sound use.

* 2 x 150 + 2 x 300 in 2 Ohm stereo use, to power double sets of coax/components.

* 2 x 175 + 2 x 350 in 1 ohm stereo use, to power more sets of coax/components.

With 3-way variable crossovers and two sets of bridgeable, staggered output channels, you can do anything a system design needs.

SPECIFICATIONS

Series S

Input Sensitivity 0.2V - 8V

Variable High Pass Filter 20 Hz - 500 Hz (200 - 5 kHz) at 24dB/Oct

Variable Low Pass Filter 50 Hz - 500 Hz (500 - 5 kHz) at 24dB/Oct

Clipping Display LED

Tested Voltage 14.4

Tested THD 1%

Model S4

Cont Power at 4 ohm 100W x 2ch + 200W x 2ch

Cont Power at 2 ohm 150W x 2ch + 300W x 2ch

Damping Factor >550 @ 2 ohm

 

 

Cont Power at 4 ohm Mono

300W x 1ch + 600W x 1ch

Dynamic Power 400W x 1ch + 800W x 1ch

Efficiency thru Output >64%

Dimensions - mm 420L x 232W x 63.5H

Dimensions - inches 16.54L x 9.13W x 2.5H

Signal to Noise 95 dB

Shipping Weight 14lbs

2a) DD S4 #1

 

[ricebowl 10+ year member]

2b) DD S4 #2

 

[ricebowl 10+ year member]

Digital Designs M1a specs:

• 1 ohm - 1200 RMS
  
• 4 ohm - 300 RMS
  
• Dynamic Power: 2300W x 1ch
  
• 1% THD @ 14.4V
  
• Efficiency thru Output: >75%
  
• Signal to Noise: 85 dB
  

• Input Sensitivity: 0.2V - 8V
  
• Subsonic Filter: 10 Hz - 50 Hz at 24 dB/Oct
  
• Variable Low Pass Filter: 20 Hz - 200 Hz at 24dB/Oct
  
• LED Clipping Display
  

• Dimensions - mm: 300 L x 235 W x 53.4 H
  
• Dimensions - inches: 11.81 L x 9.25 W x 2.1 H
  
• 12lbs
  

3) DD M1a

 

[LosIsATool 5,000+ posts]

That S4 though //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 

[ricebowl 10+ year member]

Open to offers. Please send your zip when doing so.

Thanks.

 

[ricebowl 10+ year member]

DSP and M1a sold. Both S4's still available.