How do I connect my RE-XXX 6.5's to the Orion HCCA 225G4?

Hey Guys,

My Equipment:
- Alpine CDA-9835HU
- Focal Utopia 165W 2-Way Components in Front
- PPI Ax400 to power Utopias
- RE-XXX 6.5" Midbasses for rear doors
- Orion HCCA 225G4 to power XXXs

The Problem:
Now, my problem is this . . . how should I connect the RE-XXXs to the Orion HCCA 225G4? It is a cheater amp, so it likes to see a low impedance. The mids are 1.75ohms, so if I connect in stereo, the amp will only produce about 65W RMS, but the XXXs want to see 150W RMS. Is there a way to wire up the RE-XXXs in mono so that I get a larger output from the Orion, more suitable to the XXXs? The RE-XXXs are going to be the bass line of my car, because I will not be having any subs this time around. See the specs on the Orion and XXX below.

Here are the specs on the RE-XXX 6.5" Mids:
RE: 1.75 Ohms
Fs: 47.4 Hz
Qms: 2.33
Qes: 0.59
Qts: 0.473
Mms: 15.04 g
Cms: 7.505E-04
Vas: 21.49 ltr
1- way Xmax: 13mm linear
Le: 0.14mH
Bl: 3.636 t/m
Power: 150wrms
Spl: 87.75 dB 1W/1m

Here are the specs on the Orion HCCA 225G4:
4.0ohm stereo ~ 25W RMS
2.0ohm stereo ~ 50W RMS
1.0ohm stereo ~ 100W RMS
0.5ohm stereo ~ 200W RMS
4.0ohm mono ~ 100W RMS
2.0ohm mono ~ 200W RMS
1.0ohm mono ~ 400W RMS

Please help ASAP.

Thanks!
Bryan

Bryan, connect your 2 midbass drivers in parallel and then bridge the amp. That should give you max power.
The G4's power numbers were rated at 12v. So in your car, you will get much more. Use the volume control with care.

Isaac,

Would the loss of stereo in the rear midbasses be a big deal? If I run them like they are subs, the left and right isn't really going to make a difference, is it?

Thanks,
Bryan

Would the Orion be OK running at 0.85ohm in mono? te manual only goes down to 1ohm in mono, but 0.5ohms in stereo . . .

Thanks again!!
Bryan

It is very close. That is why I said use caution with the volume control.
Set the gain/level to a tad lower. For example, if your HU is 4v, set it to 4.5v on the amp.

Or is there a trick I can do with wiring up the factory rear Volkswagen tweeter with the RE-XXX's to get a lower overall impedance? I am going for a front sound stage though, and the rear tweeter might distract from the front . . .

Regards,
Bryan

Thanks Isaac. I will mention the Bandpass mode to the installer. What does Bandpass mode do?

Thanks,
Bryan

Thanks Isaac,

I did the bandpass as you recommended. The RE-XXXs sound really good, but when we measured the resistance on the Orion HCCA 225G4, it was 1.5ohms . . . with two 1.75ohm XXXs wired in parallel, shouldn't I have 0.875ohms resistance?? This really confuses me . . .

Thanks,
Bryan

You don't think that having a speaker rated at 1.75ohms, but is actually 3.0ohms is a big deal? It is nearly double the impedance as advertised . . .

It sucks, because the HCCA wants to see low impedance.

Have you seen something like this before? Where a speaker has nearly twice the impedance as advertised?

Thanks!
Bryan

I never knew that there was that much variance in the load of speakers. It makes it kind of difficult to properly match speakers to amps if that is the case.

Oh well, the 1.5ohm load should be sufficient.

Thanks,
Bryan