Welcome to my guestbook, where you can see what previous visitors think about this site and my projects and articles. Many thanks to everyone who has left messages - your feedback really is appreciated!

Guestbook entries from 2011 (7)

    • Roberto
    • Italy
    • 19 December, 2011

    Greetings from Italy !

    I'm building a digitally controlled preamp too (but using an ATMega processor and a 320x240 color touchscreen LCD) and your site has been very inspiring for me.
    Keep up the good work !
    Best regards.

    • Mike Holland
    • Sydney, Australia
    • 16 October, 2011

    Hi Mark,
    I am searching for a little advice/help on my problem with my mag pickup equalisation stage. I am running a LH Class A amplifier with the pre-amp that he produced for his 75 watt amplifier. Recently I stopped getting any bass with my records, in both channels. First thought was that the earth connection was broken, and I was just getting the difference signals for the two channels, but everything checked out fine. I have tried a different pickup cartridge, to no avail.
    My "Stereo Checkout" disk indicates that I am getting nothing below about 200 c/s in either channel.
    Do you have any suggestions what could cause this? Any component failure should only affect one channel, unless it is in the power supply!
    Any help gratefully received.

    • gerald a estes III
    • olongapo city, philippines
    • 13 October, 2011

    greetings mark,

    10/13/2011 @ 9:35am local time... WOW! fantastic! your projects are truly inspirational!

    found the site searching 'powered speaker circuit design'.

    what you have here is a u.s. licensed architect / design firm, relying as of late on design/build woodworking projects wishing to thank you.

    5's acrost the board regardless of the ck'd items.


    • mike
    • UK
    • 3 August, 2011

    Hi Mark

    I was very interested to read the views of everyone on Rogers speakers.I heard a pair of LS6s demonstrated in 1986 at Cambridge and bought them on the spot to use with my Quad 405-2 power amp and Quad 44 preamp acquired at around the same time. It was a marriage made in heaven and still use this amp/speaker combination today. Admittedly I had originally intended to upgrade the speakers when funds allowed, however over the years I found the necessary financial outlay unjustified by any apparent improvement in sound quality.

    At the time I heard them demonstrated against Tannoys and Spendors and found the Rogers a good balance between the bass performance of the Tannoys and the top end performance of the Spendors. This sounds like my choice was a compromise but it wasn't, as proven by the test of time!

    • Guritno Djanubudiman
    • Jakarta, Indonesia
    • 5 April, 2011

    Nice project you have.
    How do you explain, how/where the subwoofer/bass lower frequencies are being separated on your circuit sector?

    Thanbk you
    Best Regards,

    • sir lord keith
    • rochester kent
    • 16 March, 2011

    nice one dave in hornchurch for repairing my ls33 rogers speakers i was quoted £300 from a local engineer thanks to marks project page i found a link for dave smith of dk loudspeakers hornchurch who i found to be a speaker wizard of the highest order a truley nice guy who magiced my lovely speakers back to life for £20 with spare parts he had in stock 24hr service .....what a guy...cheers man..sir .lord

    • Radoslaw
    • Warsaw, Poland
    • 1 January, 2011

    Dear Mark!

    Thank You for your time and patience in doing this site!

    I know many people with true passions and I admire it, but sharing hard-gained knowledge with other people is even something more!

    Take Care!