Unboxing and Review of Alpine's R-A90S 6-Channel Amplifier

[@spacewizard69r96]

Just bought another one! Cant beat them!

[@spacewizard69r96]

Just installed this! Its soo good

[@TickleFingers]

This is perfect for my 3 way active aspirations in my current build. I only want to run two amps max, but wanted higher output for the woofers. Most 6 channels are all the same output as you mentioned and an 8 channel with 4 channels bridged is just unnecessary. My choice was AudioControl LC-6.1200, but looked up Alpine 6 channel on a whim and found this unit. I think I'm sold on the price and that it has the numbers that I'm looking for. I love my AudioControl amps, but I'm really excited about this amp.

[@TickleFingers]

@Tom Smith 🤦🏼‍♂️ because smart people know how to use DSP's and don't need crossovers on their amps. 🤣 What a stupid comment.

[@edgarbermudez264]

❤😢❤❤❤❤❤❤😮

[@mattb9664]

Now we can get 2 6-channel amps, a DSP, and now your ready to go for an active setup!

[@eduardobatista329]

Love your product and info, thank you

[@impulseproman]

i have type R in my car 4 ch and mono block for Type R sub i need to add the MC30 mid speaker can i put that speaker in the rear or i have to place in front with component speaker

[@ERA71K]

Wanting to run 6.5 components and 2 sets of 6.5 coax is it possible?

[@bradmeek]

I'm going to be running this amp for the front stage, I'm hoping that hi-res badge isn't just for show hahaha

[@richardnegron9728]

What's the price

[@meademods6024]

why would you want to bypass the crossover to use the speaker actively?

[@JasonWW2000]

Does anyone know where I can get a replacement decal that goes over the blue light?

[@jessesanchez2342]

Wich speakers are the Best Quality or best recommended for this AMP ?

[@eduardobatista329]

Sure i use cdt audio 3way with crossover for front and back and use a 12 or 15 in sub, best sound, only because dt crossovers are amazing, but only the high level, mx 1000, hd series or euro series, alpine v9 are still my favorite or the new tiny Rockford fosgate

[@eduardobatista329]

These days you can use the dsp on pioneer double din headunit and use 2 way or 3 way crossovers sets, technology has upgraded, for example aside from cdtaudio, focal k2,k3,etc.,precision ausio,sb acoustics, hybrid audio, and the system will sound like its ready for competition, eventhough its stealth.

[@keithmiles3045]

I want to use this amp to use for 2 components 6.5 in front stage. 2 coax back door 2 6x9 in back window how would I set up the filters. I do have a 2.8prv dsp also.

[@shockwaveey]

Would I be able to power 4 door speakers and 2 tweeters?

[@mexlmb]

Hello Chris, what kind of rca inputs are on this amp, single end input or differential? The reason I ask is because I intend to use my stock head unit and speaker-rca conversion. I would like to figure out if it would be better to run single end rca cable (which has shielding) from the amp and just terminate the bare wires at the head unit. The idea would be to reduce noise. However, if the amp has differential input I could just run speaker wire and convert to rca near the amp. Thanks!

[@kokteong1]

Hi Chris, for 4 channel amplifier, which model is the best in terms of quality. Please advise.. Tq

[@mrmakapackermcintosh2407]

What r series subs or sub can i run with this, im currently running one atm with the same series 2way coax speakers front and back. Any input from you guys would be apreciated

[@kokteong1]

If I need 4 channel, would it be better to have 2 units of 2 channel or 1 unit of 4 channel amp? Tq

[@tylerwarren9892]

I got the alpine ilx w650 with the kta 450 power pack. With the power pack, how would this function and be compatible with this 6 channel amp? I have R series S65c.2 speakers and R- W10D4 subwoofer. (Full alpine set up). I just haven't gotten an amp yet cause I'm not fully educated on these things and I want the amp to be compatible with the kta 450 amp installed behind the sterio

[@jesseedgell8698]

Is this 6 channel amp really 75w rms x4 at 4ohm and 150w rms x2 at 4ohm for the 5and 6 channel please

[@jesseedgell8698]

Because I have 2 sets of rockford t2652-s components that are 75w rms each and I have 1 pair of kicker 6x9 speakers that are 150w rms I just want to know if this 6 channel amp will be perfect for all these speakers please

[@JasonWW2000]

​@@jesseedgell8698yes, those are the ratings. It probably puts out a little more than what it's rated at. Keep in mind that you don't have to match the speaker power ratings to the amplifier power ratings. Speaker power ratings are thermal based which means they can handle a lot more power than they are rated for. You just have to make sure and not overheat the speakers.

[@jesseedgell8698]

@@JasonWW2000 is there any way you could dyno test a couple of them and see exactly what the rms power is for all 6 channels at 4ohm please

[@frankievaldez2887]

I have a 2018 f150 I want to get speakers for my 4 doors what would u recommend? Plus I would need a amp n a sub any recommendations? I have the apline 9" halo.

[@mr.raven0]

can any channels be bridged at 2ohms for a dual coil 4 ohm subwoofer or only bridgeable at 4ohms?

[@JasonWW2000]

All the individual channels can be run at 4 ohm or 2 ohm. Channels 1/2, 3/4 and 5/6 can be bridged at 8 ohm or 4 ohm. Channel 1/2 bridged at 8 ohm is 75 x 2 or 150w. Bridged at 4 ohm is 100 x 2 or 200w. None of the channels in bridged mode are 2 ohm rated. Hope that clears it up.

[@zhoaibraja2992]

Could I use this amp to run 6 speakers? Components in the front and rear doors (Channels 1-4) and coaxials in rear deck (Channels 5-6)?

[@beekaye1496]

Yes, that’s the perfect for your system

[@JasonWW2000]

That will work, but your wasting a lot of power. I would run the front components on channels 1/2 for the tweeters and 5/6 for the mids. Then use 3/4 for the coaxials. Then use

[@andrewschmitt2631]

So I got this amp but my mid range door speakers are 105rms so if I do the bridge on 5/6 would the 150 be too much for them?

[@JasonWW2000]

I'm not sure I understand. What are you bridging? You can definitely run a pair of mids off channels 5 and 6. Having more power than you need is great. Just don't play it so loud, so long the voice coils start to smell.

[@carlmercado9131]

2 6prvs with prv tweeters and 2 prv 6.9

[@derosmane4107]

Can i use the 5/6 channel for My underseat woofer from My e90 and 1/2 Front Doors/ & 2/3 for the rear Doors mid range Coax??

[@spacewizard69r96]

yep

[@Vinyl709]

I got a Alpine Al-35

[@bendeco]

150x2 or 250x2?

[@JasonWW2000]

It depends on the ohm load. 150 x 2 is at 4 ohm and 250 x 2 is at 2 ohm.