Pass Labs X260.8 monos or X350.8 with Magnepan 3.7's

RE: Interesting question - I wonder how many people have tried them with 3.7s or 20.7s? ..., posted on November 8, 2021 at 16:27:34
andyr Manufacturer Posts: 12548 Location: Melbourne Joined: September 2, 2000	At 350wpc - as against 260wpc for X260.8 monoblocs - surely the X350.8 would be the one to go for? Andy

RE: Pass Labs X260.8 monos or X350.8 with Magnepan 3.7's, posted on November 8, 2021 at 16:46:50
SteveJewels Audiophile Posts: 244 Location: OH Joined: August 11, 2018	Into 4 ohms the Pass Lab amps put out twice as many watts, 520 W and 700 W respectively. I am using an X250.5 with T-IVa's. It seems to be adequate. I have been thinking about getting an X150.5 and biamping just to see how it sounds.

RE: Pass Labs X260.8 monos or X350.8 with Magnepan 3.7's, posted on November 8, 2021 at 16:59:35
timm Audiophile Posts: 780 Location: Ann Arbor Mi Joined: January 15, 2008	It would be interesting to hear if anyone has experience on this. Would be interesting to hear about the XA series as well I have not heard these but I would think the monos would be the choice.

A more affordable choice, posted on November 8, 2021 at 20:21:10

GreatSound

The parasound A 21+

A John curl design!

500 WPC at 4 ohms.

https://www.audioadvisor.com/prodinfo.asp?number=PAHA21P

RE: "and biamping just to see how it sounds" ..., posted on November 8, 2021 at 22:53:47
andyr Manufacturer Posts: 12548 Location: Melbourne Joined: September 2, 2000	If you intend to replace the external bass LP / mid HP XO with an active XO ... then I suggest it will sound pretty spectacular! :-)) Andy

RE: "and biamping just to see how it sounds" ..., posted on November 9, 2021 at 00:10:21
Roger Gustavsson Audiophile Posts: 2055 Location: Huskvarna Joined: February 12, 2010	Andy, there is no external crossover, it is all internal in the 3.7/3.7i.

RE: "Aah, yes - so it is! So biamping is not possible" ..., posted on November 9, 2021 at 00:12:56
andyr Manufacturer Posts: 12548 Location: Melbourne Joined: September 2, 2000	unless you bypass the internal passive 1st order XO. Andy

RE: "and biamping just to see how it sounds" ..., posted on November 9, 2021 at 02:16:10
SteveJewels Audiophile Posts: 244 Location: OH Joined: August 11, 2018	I have a Pass DIY Biamp 6-24 kit to build for crossover duties. I already built a new passive crossover the the mid to tweeter.

RE: "and biamping just to see how it sounds" ..., posted on November 9, 2021 at 02:50:21
Roger Gustavsson Audiophile Posts: 2055 Location: Huskvarna Joined: February 12, 2010	SteveJewels wrote: " I already built a new passive crossover the the mid to tweeter." Series or parallel mid to tweeter crossover? Are you willing to show us?

RE: Pass Labs X260.8 monos or X350.8 with Magnepan 3.7's, posted on November 11, 2021 at 11:16:50
josh358 Industry Professional Posts: 12332 Joined: February 9, 2010	In my experience, you'll be blown away if you biamp the IVA's. It takes them to a new level. I think this has to do with the fact that it has better control of the drivers. With the XO, the drivers aren't electrically damped outside of their passbands.

Save some money for subwoofers, posted on November 11, 2021 at 14:37:33

GreatSound

The 3.7/3.7i Magnepans do not go below 40 Hz.

They need subwoofers!

Unlike the previous 3 series Magnepans that are flat to 30 Hz in good rooms.

RE: "Unlike the previous 3 series Magnepans that are flat to 30 Hz in good rooms" ..., posted on November 12, 2021 at 03:44:50
andyr Manufacturer Posts: 12548 Location: Melbourne Joined: September 2, 2000	Not sure I can agree with you there, GS. :-(( My IIIas were good to about 35Hz - and by "good to" ... I don't mean flat ... simply hearable. Andy

RE: "Unlike the previous 3 series Magnepans that are flat to 30 Hz in good rooms" ..., posted on November 12, 2021 at 11:53:45

GreatSound

Your MG IIIas were not stock! Different frame material, and not "tuned" by Magnepan.

How much listening have you done with the "stock version" in several different rooms?

The MGIIIa has the largest bass area of any of the 3 series, hence lower bass.

Try the MGIIIA in the right size room for lowest bass.

Also, the power amp choice effects the low end too.

Some power amp-magnepan combinations go lower than others.

RE: "Unlike the previous 3 series Magnepans that are flat to 30 Hz in good rooms" ..., posted on November 13, 2021 at 17:20:43

andyr
Manufacturer

Posts: 12548
Location: Melbourne
Joined: September 2, 2000

You said:

1. The MGIIIa has the largest bass area of any of the 3 series, hence lower bass.

Agreed!

2. Try the MGIIIA in the right size room for lowest bass.

Please give me what you define as the dimensions of a "right sized room".

3. Also, the power amp choice effects the low end too.

Some power amp-magnepan combinations go lower than others.

Agreed. :-))

All I am questioning ... is your statement "flat to 30 Hz".

Andy

RE: "Unlike the previous 3 series Magnepans that are flat to 30 Hz in good rooms" ..., posted on November 14, 2021 at 13:37:21

GreatSound

It is just my experience owning and using the MG IIIIa since 1987 with many amps in many rooms.

The low end response quoted by Magnepan is "Typical' in an average room.

It can go lower in certain rooms, and after the speakers age.

You never had the same experience as me. Your IIIa was a dyi, not stock, and gave different results.

Quit arguing, we have different experiences, that is all.

RE: Pass Labs X260.8 monos or X350.8 with Magnepan 3.7's, posted on November 14, 2021 at 16:57:43
tortjohn@yahoo.com Audiophile Posts: 204 Location: MA USA Joined: March 28, 2018	Either will have plenty of power I'm using 250.8 with 3.7i and the amp seldom leaves class A. Joto

Planar Speaker Asylum

Pass Labs X260.8 monos or X350.8 with Magnepan 3.7's

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