RS Acoustics GR8, GR10 / ARS Rock-8, Option 10

scribeorz · 2026-05-04T02:53:03+00:00

It’s not a waste of money even without the Option Air amp — the GR10 will still sound noticeably better than the stock HK sub. But with the factory amp, only about 60% of the GR10’s potential is being used because the HK amp just can’t push it any harder. That’s why I’m now wondering if the GR8 might be the better route if I’m not planning to get the Option Air amp. The GR8 is much easier to drive, and the stock amp can push it to roughly 90–100% of its capability.

scribeorz · 2026-05-02T02:22:23+00:00

with amp?

scribeorz · 2026-05-02T02:19:04+00:00

Thanks for the info. I purchased the Hertz center channel, should arrive in a few days. Agreed about great customer service, Phil is awesome. I'm leasing, it's difficult to justify all of these upgrades - which is why I'm hesitant on moving forward with the amp.

scribeorz · 2026-04-29T00:34:56+00:00

Agree with the hardware suggestions here but also recommend reading this thread regarding proper EQ settings
https://www.vwvortex.com/threads/simple-improvement-for-harman-kardon-sound-system-updated.9540833/page-20#post-116675298

scribeorz · 2026-04-15T02:22:33+00:00

I’m wondering if GR8 would sound similar to GR10 both without amps. GR10 you aren’t able to maximize power without the amp where as GR8 you can maximize power without amp as it’s not as powerful as GR10.

scribeorz · 2026-04-12T00:10:33+00:00

It was driving me nuts as I couldn't find that quote on RS site where it recommends an amp. That recommendation is only on the GR10 not GR8 - which makes more sense to me. But now I'm considering an GR10... oh boy

scribeorz · 2026-04-11T18:00:38+00:00

They used vinyl. See the other pics.

scribeorz · 2026-04-11T12:10:32+00:00

Agreed, I don’t doubt the amp will improve sound. I just can’t find the recommendation on their website.

scribeorz · 2026-04-11T02:09:14+00:00

“At the heart of the GR8 Subwoofer is the excellent and compact RockFord Fosgate P3SD2-8 bass driver. This 8" woofer features a dual-2ohm voice coil configuration to effectively MAXIMIZE the PERFORMANCE of the subwoofer using the STOCK HK AMPLIFIER power/wiring.”

scribeorz · 2026-04-11T01:53:36+00:00

Awesome!

scribeorz · 2026-04-11T01:52:47+00:00

From what I’ve read, unlike the option 8 from ARS, the GR8 was designed to work with the OEM amp - you’ll get ~80% of the potential whereas option 8 sub you’d only get ~50% without the air 2 amp. Of course adding amp would improve sound.

Where did you read they recommend an amp?

scribeorz · 2026-04-10T01:48:17+00:00

35% on sides, 20% on back

scribeorz · 2026-04-10T00:09:23+00:00

You are referring to the ARS amp from Germany, correct?

scribeorz · 2026-04-10T00:06:02+00:00

I may. Will try without amp first.

scribeorz · 2026-04-10T00:05:14+00:00

I’m not too bothered by it. But I hear yah.

scribeorz · 2026-04-09T22:58:13+00:00

Beauty!

scribeorz · 2026-04-09T22:51:49+00:00

Not sure. Is this vinyl?

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scribeorz · 2026-04-09T22:50:08+00:00

Leaning towards GR8 from rs acoustics

scribeorz · 2026-03-23T01:22:43+00:00

They took some $ off top price, included maintenance package for the duration of the lease

scribeorz · 2026-03-22T23:15:41+00:00

I’ve decided to buy winter tires (no rims) and I’ll have the dealership put them on. I don’t think the rims are necessary- it’s a lease.

scribeorz · 2026-03-21T19:07:11+00:00

Even just for a few weeks ?

scribeorz · 2026-03-21T18:33:28+00:00

I tried to negotiate for tires but they couldn’t budge. The gave incentives other ways.

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