wiring crunch amp, 2 legacy subwoofers

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tx78109

Member - Posts: 8

Joined: March 14, 2009

Location: Texas, United States

Posted: March 14, 2009 at 7:26 PM / IP Logged

I have a Crunch P500.2 500 watts and 2 Legacy 800 watt subwoofers 4ohms. I need some help with the wiring.

Thanks

tx78109

supradude

Silver - Posts: 915

Joined: September 21, 2004

Location: South Carolina, United States

Posted: March 14, 2009 at 8:38 PM / IP Logged

Are the subs 4 ohms DVC or SVC? What ohm load is the amp stable at? Give all of the info that you can.

'85 Toy

tx78109

Member - Posts: 8

Joined: March 14, 2009

Location: Texas, United States

Posted: March 14, 2009 at 9:48 PM / IP Logged

The subs are 4 ohms and the amp is either 2 or 4 ohms. I was told I could bridge them. I do not know where to find the dvc or svc.

tx78109

Member - Posts: 8

Joined: March 14, 2009

Location: Texas, United States

Posted: March 14, 2009 at 9:51 PM / IP Logged

On the info sheet it states voice coil 1.5 ksv, fs (hz) 38, Qms 2.05, Qes .63, Qts .48, SPL (db) 89 and vas 1.794

tx78109

i am an idiot

Platinum - Posts: 13,667

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: March 15, 2009 at 12:02 AM / IP Logged

If they have only one positive and one negative connection, it is a single voice coil. If there is a set of + and - on each side of the basket, it is a dual voice coil.

If they are single voice coil woofers, you can bridge them on the amp, but you MUST wire them in series for an 8 ohm load. The amp will produce the same exact power into an 8 ohm mono load as it will into a 4 ohm stereo load.

Option 2 (series) = 8 ohm load

Speakers wired in series

Recommended Amplifier: Stable at 4, 2, or 1 ohm mono

wiring crunch amp, 2 legacy subwoofers -- posted image.

If they are Dual Voice coil woofers, you can bridge the amp at 4 ohm mono.

Option 2 (series/parallel) = 4 ohm load

Voice coils wired in series, speakers wired in parallel

Recommended Amplifier: Stable at 4, 2, or 1 ohm mono

tx78109

Member - Posts: 8

Joined: March 14, 2009

Location: Texas, United States

Posted: March 15, 2009 at 10:30 AM / IP Logged

The subwoovers are svc but my amp can be used as a 2 or 4 ohm amp. What settings should I set the amp to.

X-Over Mode

FULL LPF HPF Mono Stereo

level Bass EQ HPF LPF

5v - 0.2v 0db - 12db 60hz - 1.2khz 30hz - 250hz

Thanks

tx78109

i am an idiot

Platinum - Posts: 13,667

Joined: September 21, 2006

Location: Louisiana, United States

Posted: March 15, 2009 at 3:23 PM / IP Logged

Are you sure that the amp is 2 ohm MONO stable? Or is it 2 ohm stable?

tx78109

Member - Posts: 8

Joined: March 14, 2009

Location: Texas, United States

Posted: March 15, 2009 at 8:46 PM / IP Logged

This is what I know.

Features:

Crunch P500.2 2 Channel 500 Watt Car Amplifier ( P5002 | P500-2 )

500W 1 / 2-Channel A/B Class Amplifier125W x 2-Ch @ 4-Ohms or250W x 2-Ch @ 2-Ohms or 500W x 1-Ch @ 4-Ohms Dynamic Music Watts

SEPP A/B-Class P-Series Amplifier Designs

Bridgeable Design

Illuminated, Large New Design Crunch Logo

P. MOSFET Pulse Wave Modulated Power Supply For Instant Maxx Current Output

2-Ohm Capable A/B Class Amp

Rugged MOSFET Audio Outputs

P-Series Amp Protection with System Diagnostics LED's That Protects Against:

Current / Amperage Overload

Short Circuits

Thermal Overload

DC Offset

2/4Ch Amps Have Hi-Level Speaker Lead Inputs

Silver Preamp Level RCA Inputs

Daisy Chain Line Outputs

Verssa Cross Sound Shaping Controls

Mono/Stereo Switch

HP/LP/Full-Pass Freq. Selections

Crossover Frequency Adjustments:

(60 Hz to 1.2kHz)

(30 Hz to 250 Hz Low-Pass *)

Adjustable (60Hz to 150Hz) & Include Variable Subsonic Filter (15Hz to 55Hz)

Input Level Control (0.2 to 5V)

Oversized Speaker Terminals

tx78109

i am an idiot

Platinum - Posts: 13,667

Joined: September 21, 2006

Location: Louisiana, United States

Posted: March 15, 2009 at 10:09 PM / IP Logged

If you insist on bridging those speakers on that amp, you MUST run them in series. That amp is 2 ohm stereo stable. Which is the same thing as 4 ohm mono.

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wiring crunch amp, 2 legacy subwoofers

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