PLEASE match Advice Pass Labs X350.5 (20k) to Hovland HP-100 (2500ohms) Miss-match ???


GUYS / GALS NEED YOUR HELP PLEASE!

A friend said this preamp is outstanding and will sound great with Pass Labs amps and to not get caught up in the specs but the measurements say different.

Pass Labs X350.5 amplifier with input Impedance 30k ohms Balanced or 20k ohms Single ended* 
(*source Pass Labs Manual)  

Hovland HP-100 source impedance 2500ohms* 
(*source Stereophile) 

Guys / Gals, can I used my Pass Labs X350.5 amp with Hovland HP-100 preamp? Has anyone used Pass amps with Hovland pre's. I will be using Magico S5 Speakers and Bricasti M1SE DAC but want it to sound the best it can. Should I just stick with the Aesthetix Calypso pre I was leaning toward before my gut said to go for the Hovland HP-100

Hovland HP-100 Preamplifier: * Output impedance: approximately 2500 ohms or according to Atkinson, Hovland HP-100 (2500ohms) its source impedance was high at 2.4k ohms, rising to 4.3k ohms at 20Hz. The partnering power amplifier would best have an input impedance of at least 47k ohms if the bass is not to sound lean*. The Pass Labs doesn't meet the x10 requirement it is supposed to but it is sort of close when looking at it. What do you guys think? I am not sure what to do but you guys will know what to do?

Stereophile: Its input impedance was a usefully high 100k ohms in the midrange and bass, with just a small reduction to a still-high 86k ohms at 20kHz. Despite the claim that the HP-100 uses a cathode follower output stage, its source impedance was high at 2.4k ohms, rising to 4.3k ohms at 20Hz. The partnering power amplifier would best have an input impedance of at least 47k ohms if the bass is not to sound lean.

Read more at https://www.stereophile.com/content/hovland-hp-100-preamplifier-measurements#YZXZfGLbbL2COkLR.99 https://www.stereophile.com/content/hovland-hp-100-preamplifier-measurements#YZXZfGLbbL2COkLR.99
128x128Ag insider logo xs@2xfsmithjack
I'm happy to read that your patience has paid off.
I would leave the Pass Labs X350.5 plugged directly into the wall.
Thank you for the kind words!  Fedex tracking says the P10 and BAT should land tomorrow. Can’t wait to get home from work tomorrow night! Great thing being an Audiophile when making changes it’s like Christmas for grown up’s :) love it 😍 
Hey guys - I have some new developments in my system that I had shared in my other threads and wanted to share with you guys also. Thanks 

Hey guys - wanted to update you. I got the BAT VK32SE and my PS Audio P10 Conditioner from Fedex and have had a chance to install and listen a bit and these adds allow me to see right away where and how they fit or don't fit..

Like I said I am learning and working toward building my new system re-fit and figuring it out on the fly. I know I am going to make mistakes because most all my buys are without listening first. I know not ideal but also most items I am buying are used so that is sort of the price of this approach. Saves a ton of money but I also don't get to try in my own system first but also buying used and properly allows me to re-flip the items that are not the fits I am looking for.

This said here we go.

I know it is very early but right out of the gate the BAT is not for me. Great preamp and nice and warm and sounds great but these Magico speakers are so transparent and so resolving that they crave - require and demand nothing but the most transparent and neutral components in the chain.

The BAT just provides a bit too much in terms of moving away from neutrality.

I now understand why all you guys want components that are dead neutral. I never got that before but I sure do now. Clear as day!

Once your system gets to a level of transparency where every little change really is highlighted and effects the whole you want everything else that is added to not take from that.

The BAT is sweet and has great bass and sounds great but I have been running my Bricasti direct and realize just how much more I appreciate that sound vs what a tube preamp offers.

Maybe another tube preamp that is more neutral would be more to my liking but I am on the transparency train now and its hard to add anything that doesn't help scrub that window clean and make it as clean and as pure as possible where the BAT added too much tint to that window. A pleasant hue of tint but I tint none the same and many of you told me this and I want the glass in that window as pure and as pristine as i can get it and would love help and feedback from you guys.

Many of you called this but it was important for me to try a decent tube to get that doubt out of my mind and sort of flush my brain of that idea. Sure tubes can add so much that is desired but in my situation the trade off's where too steep of a price for me and one I am not willing to pay.

What do you guys think?

I am thinking Solid State preamp. Ayre K-1xe or maybe a Mark Levingson 326s. I would love a Pass XP20 but none out there used and the XP30 way too much money and the XP10 might now be able to outdo my Bricasti direct. Decisions / decisions.

Also, the PS Audio P10 is fantastic. I love it and it was a nice add on the neutrality and transparency front so happy about that.

I am batting 500 liking 1 out 2 of my last changes/adds.

Also, on my new focused path of neutrality and transparency I am making another speaker cable change. I know a couple weeks is very quick for these changes but in light of what I have learned it makes sense to me.

I switched from HiDiamond D8 to Cardas Clear Reflection speaker cables. My main reason at the time was my speakers with the former cables were incredibly bright and I wasn't happy with my speakers and this cable change and the added break was very helpful to fix this.

The bottom line is the HiDiamonds and the Magico's were not a good match so I pulled the trigger and made the change. I went to warmer and richer cable which was a nice change but the cable is a warmer and richer cable. I want neutrality and transparency so I today pulled the trigger on a cable change.

I sold my Cardas Clear Reflection speaker cables for the same price I paid for them so no financial pain there but they did help me learn more about my speakers and my preferences as it relates to these speakers. Also, what drove this is my ideal cable came available so I pulled the trigger. These were more money than the Cardas CF cables. Not a ton more and but a few hundreds more not crazy expensive considering the buy sell road i take but I am hoping this will be a nice change because these are a more higher end cable and well thought of cable and are known to work great with Magico's

Kubula-Sosna Emotion 2.5 meter Speaker Cables. I am hoping these are great. I am hoping these and a solid state preamp rather than a tube preamp will get me closer to where I want to go. Both changes are chasing that neutrality and transparency goal. There is always the fear of going too far the other way so that is why rather than a Nordost or a silver cable I went with the Kubula-Sosna Emotion as they are known to be a musical cable yet quite transparent.


I think my guiding goals are now transparent, musical and neutral and in this order is this is what will drive all my future decisions and not sure I could own this so confidently without my trial error process of trying on this BAT tube preamp.

What do you guys think?

Any good SS preamp idea's?

Any of you guys here these speaker cables I just bought?

Thanks as always for all the help.