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Q&A # 381 - February 12, 2004
 

Staff

 

Q I have an old Sony CD player which has both analog and optical digital outs. I have connected this to my Denon 1804 receiver. How should I hook this up to get the best sound - analog or optical? The Sony CD player says 18 bit Linear D/A and the Denon has "24 bit, 96 kHz High Resolution D/A Conversion"

A Either way, you are dealing with 16/44 CDs, and what it probably means is that the Denon DACs are capable of 24/96 bit depth/sample rates, which is fairly irrelevant in itself when reproducing CDs. However, 18 bit DACs in the Sony imply that they're rather old, in which case unless they were exceptional for their time, my money would be on the Denon. However, none of these number games gives any indication on the quality of the reconstruction filters, be it via oversampling or the good old analog filter, which can have substantial effects on the top end response of the digital to analog conversion outputs.

T

Q I have a Panasonic DVD RP-91 player and a Toshiba Direct View HD monitor 34hfx83 and I am noticing issues when watching DVDs. I have the DVD and TV connected to my Yamaha RX-V540 receiver using the component in and out. This only happens occasionally, and during playback the picture loses some color, only red though. Red seems to fade entirely and flesh goes very dull. Bright and yellowish color seems to take over. Now this only happens once in a while and it doesn't matter what DVD I am watching. Turning the RP-91 off corrects the issue and usually never comes back for the rest of the movie. It seems to be intermittent. I am wondering if it is the RP-91 as is not new, it was the store's demo, and other than this it is excellent player. I am using UltaLink Component video cables and they are all connected accordingly.

A Component video has separate conductors for luma and two of the colors (the third color is obtained by the difference), so it sounds a color conductor is intermittent. Try using S-Video and see if the same problem happens. It might be a loose component RCA jack.

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Q I have a Pioneer Elite PRO-530HDI connected to a Dish Network 811 HD Satelite receiver. The 811 outputs HD signals in both component and DVI signals in 1080i format. The television has inputs for component and HDMI for the HD signals. Both of these are 1080i. I might also add that the component cables are Monster brand and the DVI-HDMI cable is made by Gefen Inc (there aren't many companies making these cables). Now my question:

Why would the component video connection have a clearer and brighter picture than the HDMI connection?

I hooked up the DVI-HDMI connection and switched between the component connection and the DVI connection and could tell a difference. I was pretty disappointed because I thought that the DVI would give a noticeably better, crisper, brighter picture.

I tried switching to 720p and that made things worse.

Any ideas? Should I return the DVI cable or is this just the difference between the two?

A I don't think it is the cable. If there were a cable problem, you would likely not get any picture at all. Remember that component is analog and DVI/HDMI is digital. With component, the player is doing the decoding, while with DVI/HDMI, the display is doing it. I see differences between interlaced and progressive in terms of brightness as well. It all depends on how the player handles the video vs. the display. It is not necessarily due to some basic differences in component vs. DVI/HDMI. Also, the player may not be outputting the DVI signal correctly.

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Q My DVD player doesn't have 5.1 output, but it does have an optical output. Can I connect the optical output to the receiver optical input and let the receiver decode? Will that work ok or should I find another DVD player that decodes 5.1?

A All modern receivers decode 5.1 DD and DTS movie soundtracks, and all modern DVD players output the DD and DTS signal through the digital output jacks, either coaxial or Toslink optical. However, with SACD and DVD-A, there has been some confusion since they are 5.1 as well, and none of them outputs SACD or DVD-A 5.1 digital signals through standard coaxial or Toslink optical jacks yet. If you have a Universal Player, it outputs DD and DTS through the coaxial and Toslink optical jacks, but they will have a set of 5.1 analog RCA jacks through which the analog 5.1 output from SACD and DVD-A discs will be sent. You connect those to a set of 5.1 analog input jacks on your receiver for use when you play such discs.

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Q I enjoyed your work on the Secrets progressive shootout. I have kept up with it for the past couple of years. But can you recommend a good interlaced player? I recently picked up an IScan Ultra, therefore I don't need an expensive progressive player. I'm currently using my Denon 2800 (in interlaced mode), but I find it soft.

A I don't think anyone makes a player that is interlaced only now. They are all switchable interlaced/progressive. The softness in your interlaced mode may be a property of the IScan settings, as it does the deinterlacing when you send it out from the player as an interlaced signal. I see it both ways from player to player. Some look better when you let the player do the deinterlacing, and some look better when you let the display do it. You might want to take your IScan to a store with several players and just change the player, using the IScan and the same display for all the comparisons, making sure of course, that each player is set to output interlaced signals.

T

Q How is Denon 2900's Redbook CD playback as compared to a dedicated CD player like the NAD C541i?

A The DACs in DVD players have gotten so good, it is unlikely that there is much difference, assuming all other variables the same. To do a proper comparison, though, it is more likely that you need to compare the Denon 2900 with a Denon CD player rather than a NAD CD player. Some engineers seem to feel that having DVD and DVD-A (also plays CDs) in one player is OK, but if you try to fit everything in there, i.e., DVD, DVD-A, and SACD (also plays CDs), it is too much circuitry that interferes with each other. I use a Denon DVD-5900 for most things, but a Classé CDP-10 dedicated CD player for other listening because it is fully balanced and has some of the best bench test results I have ever seen. But, even that wonderful player has a tough time competing against SACD or DVD-A because of the increased resolution of those discs.

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Q I have put together over the last five years what I regard as a fairly successful mid-range HT setup. It includes a Sony GA7ES receiver, DVP-S7000 DVD, EP9ES DSP, SAT-T60 DirecTivo, Samsung SIR-T151 HDTV decoder and (most recently) a Pioneer Elite Pro-530HD RPTV. Output is through B&W DM603 fronts, CC6 center, AS6 subwoofer and JVC in-the-wall rear speakers.

Recently I have been considering updating the DVD to support progressive scan, and to possibly retire the DSP to reduce complexity. In general I am confused identifying the weak links in this system and the proper components to replace. Can you recommend which pieces should be replaced, and in which order (or simultaneously) to maintain a reasonably balanced system?

A I would suggest getting a high def satellite box first, then a 7.1 receiver or SSP with outboard power amplifiers. The rest of your system looks fine as is.

T

Q  I have a Paradigm PS-1000 sub, 175 watts rms, 525 peak. It is a 10 inch band pass enclosure with three very substantial ports supplying the only pathway for the bass to reach the room. Aside from doing this and coming to my own conclusions, what would happen to the power and performance or anything else if I plugged one or even two of the ports. Do I stand to gain anything or just lose bass?

A Likely, it will give you response to lower frequencies, but won't play as loud. Some subwoofers are designed for you to plug one or more ports at your choosing, depending on whether you prefer loudness or deep response. Your sub is a band pass design, so all the bass must come through the ports. Plug the ports, it may go a little deeper, but will certainly lose loudness. Considering that band pass designs are carefully tuned, I'd suggest not doing it. Even most bass reflex designs really shouldn't be messed with unless they were specifically designed to allow plugging the ports for a different response. On many designs, plugging the port will simply roll off deep bass response sooner, and the deepest bass will only increase far out of the useable range/amplitude, i.e., it'd be down 30 dB at 20 Hz instead of 50 dB, and it'd be down 20 dB at 45 Hz instead of flat. Some designs allow you to do such, but it's not the norm.

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