SOUND UPGRADE SENNHEISSER – CUPRA - SUBWOOFER/ DSP

[NLCupraLeonHybrid]

SOUND UPGRADE SENNHEISSER – CUPRA

For those interested: recently I’ve been working on a fun upgrade project for the Sennheiser system, in combination with the original speakers.

WHY?

In my previous Cupra Leon, I installed a Match UP6 DSP and subwoofer, professionally tuned with a microphone and calibrated by a specialist. That system sounded noticeably better than the current Sennheiser system.

What I currently miss:

• Deep, powerful bass
• Balance at higher volumes (it quickly becomes harsh)

1st Improvement – Subwoofer Upgrade

• Installed: new enclosure with Option 8-Air D2 subwoofer (210W RMS)
• The standard L-shaped subwoofer was simply not powerful enough
• This new enclosure is custom-made for the Cupra Leon Station and fits perfectly on the left side of the trunk
• Plug & play using the original wiring

Result: Immediate and clear improvement over stock

Problem:
The power from the standard Panasonic amplifier (estimated ±50W) was still too limited → not enough output

2nd Improvement – Additional Amplifier (Helix)

• Installed: Helix One Amplify 201 with crossover

This provided approximately 400W of power for the subwoofer

Result: Another significant step forward in output and power

Problem:

• Limited tuning options
• Subwoofer only really came alive at higher volume
• No DSP → no advanced tuning possibilities

3rd Improvement – MATCH UP10 DSP

• Installed: Match UP10 DSP (8 inputs / 10 outputs)

Challenge:
No standard wiring harnesses are available yet for this setup

MATCH UP10 DSP (Expansion)

• The original Panasonic amplifier uses 12 channels
• Based on advice, I chose the Match UP10, but it only has 8 input channels as standard
• Therefore expanded with a MEC Analog Input module (+2 inputs)

Effectively, this becomes a UP10.10 (same device, but normally with the module built in)

Channel Layout

• Front: 3-way system (High / Mid / Low) → 6 channels
• Rear: 2-way (left/right bridged) → 2 channels
• Center speaker → 1 channel
• Subwoofer (via RCA out) → 1 channel

WIRING – Helix

• Since the Helix was already installed and provides more power:
  • Controlled via RCA output from the Match DSP
  • Remote signal from DSP (on/off)
  • Power and ground from the rear battery
  • Subwoofer connected via speaker cable

WIRING – MATCH UP10 DSP

• Ready-made solutions: not available or > €500
• So I went DIY: ordered a 38-pin Match extension cable and modified/soldered it myself

Additional wiring:

• 4-pin cable to the center speaker (not amplified as standard)
• Conductor Pro installed near the phone charger, cable routed to the front via door seals
• Power: from rear battery, ground to front grounding point

DSP PLACEMENT

• Mounted under the front seat; space is very limited
• Cables are stiff → difficult to route cleanly

Alternative locations were considered, but would require longer cables and be harder to hide.

Under the seat just fits, and with the cover installed it still looks neat

CONFIGURATION AND TUNING

• Initial setup done via Audiotec Fischer software (channels and outputs configured)

First impression:
System works properly, with clearly more available power

Still to do:

• Professional tuning (next week)
  • Optimization of EQ, time alignment, and crossovers

Note: this comes at a cost

If you’re considering doing this yourself and would like the file (for a hatchback or station with Sennheiser system), feel free to contact me

COSTS (Approximate)

• 1st upgrade: Subwoofer enclosure + woofer + wiring: €350
• 2nd upgrade: Helix amplifier + wiring: €250
• 3rd upgrade: €1450
  • Match UP10 DSP: €1050
  • Match wiring harness: €100
  • Match Conductor Pro: €150
  • Match Analog Input MEC: €100
  • Fuse holder, RCA cables, misc: €50
  • Professional tuning: €…

RESULT
Final result coming next week

 

[TVK]

Nice, i got the Helix M Six DSP Smallprint in the car.