Hi JT,
.
So first of all I ordered the full kit from Troels/Jantzen which includes all of the damping material to spec. The internal wiring etc is also all provided by Jantzen. So living in US it wasn't as easy as going to the hardware store and picking up the baltic birch thicknesses prescribed by Troels. So I first built them in CAD (Fusion 360) and made it so the internal volume and front dimensions matched his dimensions exactly. I can't remember top of head if in the end depth is more or less by a few mm but it's very close due to slight differences in material dimensions. So all external panels are 1" baltic birch. I'll have to take a peek inside again as I don't remember what I used for bracing but am pretty sure it's as good as what he called for. I have the CAD I used for my plans so could send that over for your review. I did not receive any detailed build plans in the kit but rather had to get most of the info from his main page. So again, tuning/volume and front dimensions are the same and that is what practically matters from an acoustics standpoint. I have a CNC machine and used CNC to cut front baffle and some bracing but rest of it was easier just to run on a table saw.
So this is what came with the kit from Troels/Jantzen. I think there is a difference in that the FA252 doesn't have speaker level inputs but otherwise I think the FA501 is the same from power/snr perspective.
Of course I'd take care and pack appropriately. Last time I did this with LX521's I recorded the packing process and got buyer's thumbs up before shipping (could do FaceTime/video chat). I could likely provide him as a reference if you feel the need.
I'd say it'd save weight too but those are pretty light woofers for 18's
.Ok, I'll get to work on that. Just a warning this week is a little crazy with several work projects coming due this Friday but will target getting it put together by the weekend. I'll contact you via PM when I have this information.
I checked the specs of the Hypex FA252 and you're right; unlike the FA501, it doesn't have the high-level input.
That may, or may not, be an issue for me. I'm not sure at this point because I don't know if one has to power the TL-1 differently using the 252 than when using the 501. Will I need a preamplifier with two sets of outputs to use the TL-1 the way you have it configured? Don't have one of those! Or would I need an external crossover to deliver the correct frequencies to the LF section and the sections filtered by the passive crossover?
That may, or may not, be an issue for me. I'm not sure at this point because I don't know if one has to power the TL-1 differently using the 252 than when using the 501. Will I need a preamplifier with two sets of outputs to use the TL-1 the way you have it configured? Don't have one of those! Or would I need an external crossover to deliver the correct frequencies to the LF section and the sections filtered by the passive crossover?
I believe Troels recommendation is to just split the output from your preamplifier. If you have questions about this I'd reach out to Troels directly as he usually responds to questions pretty quickly. This is what came in the kit, not sure if they were out of FA501 but he provided the Hypex DSP settings for FA252 specifically. No external crossover as the Hypex has DSP built in.... For me I had no intention of using high level inputs. The FA252 also supports digital input but I believe some delay changes MAY be required. Troels would be your best source to answer questions here!
I will indeed check with Troels.
But now that I think about it, since, with your TL-1s, one needs to connect the preamplifier to two different power amplifiers via line-level outputs, there's really only two ways to accomplish that: (1) use a preamp with two sets of outputs that can be used simultaneously. or (2) use, as you've suggested, a "splitter" cable.
That's a concern for me as I don't have that type of preamp and have not had good results using splitter cables.
Should I assume, then, that with the TL-1s you've been using a preamp that has two sets of outputs?
Will let you know what TG says about this issue.
— Joel.
But now that I think about it, since, with your TL-1s, one needs to connect the preamplifier to two different power amplifiers via line-level outputs, there's really only two ways to accomplish that: (1) use a preamp with two sets of outputs that can be used simultaneously. or (2) use, as you've suggested, a "splitter" cable.
That's a concern for me as I don't have that type of preamp and have not had good results using splitter cables.
Should I assume, then, that with the TL-1s you've been using a preamp that has two sets of outputs?
Will let you know what TG says about this issue.
— Joel.
Joel,
When you do get around to pricing the cost of shipping the TL-1s, please make sure it is for delivery to my door and that it includes clearing the shipment through customs. From previous experience I know that many cartage companies often quote a price that assumes the consignee will do his own customs clearance and also collect the pallets at their local warehouse—which I am not able to do.
For what it's worth, I recently had two subwoofers (160 lbs. each in their cartons) shipped from Rhythmik Audio in Texas. They used UPS Freight—though the name has since changed. My payment to them for shipping was an all-inclusive package: all I had to do was confirm that I'd be at my unit (it's a commercial building) on a given day to receive the pallets. That's what I have in mind.
If this proves to be too complicated, or too expensive, I'll be sorry, but that's the only way I can do it. Shall wait to hear from you probably early next week. Thanks, (also) Joel.
When you do get around to pricing the cost of shipping the TL-1s, please make sure it is for delivery to my door and that it includes clearing the shipment through customs. From previous experience I know that many cartage companies often quote a price that assumes the consignee will do his own customs clearance and also collect the pallets at their local warehouse—which I am not able to do.
For what it's worth, I recently had two subwoofers (160 lbs. each in their cartons) shipped from Rhythmik Audio in Texas. They used UPS Freight—though the name has since changed. My payment to them for shipping was an all-inclusive package: all I had to do was confirm that I'd be at my unit (it's a commercial building) on a given day to receive the pallets. That's what I have in mind.
If this proves to be too complicated, or too expensive, I'll be sorry, but that's the only way I can do it. Shall wait to hear from you probably early next week. Thanks, (also) Joel.
So I have used both preamp with multiple outputs (RME ADI-2) and splitter depending on my given scenario and had no audible impact to my ears. I spent a little time thinking through this and reading some professional opinions and it really shouldn't impact things assuming A) preamp has low output impedance, B) Amps have high input impedance (54k for FA252), C) Preamp is robust enough meaning it can provide enough current for slightly lower apparent impedance. Regardless of the amplifier impedance the preamp will try to supply the same voltage. If it has enough current output I can't really see what would be impacted except damping factor. Some do prefer speaker level inputs because any character amps impart is translated to the woofer as well....
This shouldn't be an issue and is in line with what I did last time (Fedex freight). I'll have to spend some time weighing, planning crating strategy, and shopping for quotes this weekend. I totally get your concerns and will ensure your requirements are met when shopping
Hello-
Did you sell the speakers? I'm new to the forum so am unable to post a message directly to you as Moderators restrict that for a time (wisely) to thwart Bots, etc. But you can message me directly.
Thanks,
Gary