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REL R328 & R305 -- are these two REL subwoofers close enough as a match?

I bought a REL 328 as my subwoofer.
I have been been looking for a second one.
Recently, a REL R305 came to my attention.

QUESTION: In a high end music listening system: would this used REL 305 match well enough with my REL 328? Otherwise, I’d like to wait.

The passive radiator is only on the 328. That seems like the biggest difference, but I’m not sure. 
The 328 has the following:
Enclosure Type: Sealed, with Passive Radiator
Driver: 10” Long Throw, steel chassis
Passive: 12" Carbon Fiber VariCone™
Crossover: Variable, 30-120 Hz Stepped
Input Connectors: Neutrik Speakon High-Level input, RCA low level input, .1/LFE RCA input with separate volume control
Amplifier: 350W High Current REL-designed Class D
Dimensions (HWD): 13.5x15.1x15.2"
Weight: 45 lbs

The 305 has the following:
Enclosure Type: Sealed box
Drive Unit: 10" Heavy Duty Long Throw Cast Frame
NO PASSIVE
Crossover: 25Hz to 100Hz
Input Connectors:
Neutrik Speakon - High Level
Phono - LFE Phono - LINE
Amplifier Type: High-Speed, High-Current, Digital Switching Amplifier
Input Impedance
High Level: 150KΩ (Two Channel Unbalanced)
Low Level: 33KΩ (LFE Unbalanced)
Line Level: 10KΩ (Unbalanced)
Input Sensitivity
Low Level: 40dB
High Level: 22dB

Power Output: 300 Watts RMS
Phase: 0 and 180 Degrees
Voltage: 117VAC @ 60Hz
Protection: Over Current, Over Voltage
Fuse: 3.15Amp Slow Blow Small
Dimensions(WHD) 12.5x14.25x13.5
includes feet, controls and grille
Net Weight: 41lbs

This will help you compare the two:

https://www.musicdirect.com/Store/rel-r-305
https://www.musicdirect.com/speakers/rel-r-328-subwoofer
hilde45

Showing 5 responses by hilde45

hilde45's avatar
hilde45 OP
5,231 posts
 
I have not gotten responses here, but responses vary elsewhere. Rel says they should match exactly. Others have said they don't have to match if they're close. A very confusing topic.
hilde45's avatar
hilde45 OP
5,231 posts
 
I think that was a serious comment. (Hard to tell sometimes.) If so, do you think that 10 years is too old for a sub? The one I'm considering is 10years old but has been checked out.
hilde45's avatar
hilde45 OP
5,231 posts
 
@usery Thanks for your reply. It looks very tricky for your situation. 

Do you think 10 years is old for a sub? It's priced way under MSRP...

Thanks for thinking about this with me.
hilde45's avatar
hilde45 OP
5,231 posts
 
Thanks, wolf. Boy there are some folks, including REL, who say subs are like speakers and have to be matched exactly. But the reasons against that are quite convincing. It’s not an expensive experiment to do, however. 
hilde45's avatar
hilde45 OP
5,231 posts
 
Thanks. The only reason it seemed that REL was saying something indisputable was because of that direct connection between high level speakon connector and left and right channel outputs. But that would then go back to whether the mix of the recording was stereo on those lower frequencies, I guess.
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