The head unit will have 4 channels x 50w. Front speakers HYPERLINK "http://cgi.ebay.com/ebaymotors/TWO-NEW-ALPINE-SPX-107R-4-CAR-COMPONENT-SPEA KER-SYSTEM_W0QQcmdZViewItemQQcategoryZ38646QQitemZ8059795790QQrdZ1QQsspagena meZWD2V"http://cgi.ebay.com/ebaymotors/TWO-NEW-ALPINE-SPX-107R-4-CAR-COMPONE NT-SPEAKER-SYSTEM_W0QQcmdZViewItemQQcategoryZ38646QQitemZ8059795790QQrdZ1QQs spagenameZWD2V ALPINE SPX-107R * Speakers: * Peak Power 160W * RMS Power 40W * Frequency Response: 45 ~ 60kHz * Nominal Impedance: 4-Ohms * Tweeter Mounting Depth: 0.6" * Woofer Mounting Depth: 2" * Tweeter Mounting Diameter: 1.4" * Woofer Mounting Diameter: 4" * Tweeter Thiel Small Parameters: * Compliance (Cms): 0.14 mm/N * Cone Area (Sd): 4.55 cm * D.C.Coil Resistance (Re): 2.80 Ohm * Electrical Q (Qes): 0.88 * Force Factor (Bl): 1.6 T-m * Free Air Resonance (Fs): 950 Hz * Frequency Response: 600 ~ 60kHz * Nominal Impedance: 4-Ohm * Inductance (Le): 0.1 mH * Mechanical Q (Qms): 1.3 * Moving Mass (Mms): 0.2 g * Sensitivity: 86dB * Woofer Thiel Small Parameters: * Coil Height (Hvc): 11.4 mm * Compliance (Cms): 2.0 mm/N * Cone Area (Sd): 50 cm * D.C.Coil Resistance (Re): 3.2-Ohm * Electrical Q (Qes): 0.47 * Equivalent Suspension Stiffness (Vas): 7 Liters * Force Factor (Bl): 3.4 T-m * Free Air Resonance (Fs): 46 Hz * Frequency Response: 45 ~ 15kHz * Gap Height (Hag): 4 mm * Nominal Impedance: 4-Ohm * Inductance (Le): 0.32 mH * Linear Excursion (X Max): 3.7 mm * Mechanical Excursion (Peak-to-Peak): 12 mm * Mechanical Q (Qms): 5.80 * Moving Mass (Mms): 5.7 g * Sensitivity: 90 dB * Total Loudspeaker Q (Qts): 0.44 OR DLS PS4A - 2-way system 10 cm / 4" with separate filters HYPERLINK "http://www.dls.se/pdf/specPS4_PS4A.pdf"http://www.dls.se/pdf/specPS4_PS4A.p df Speaker type : 2-way system Woofer size : 10 cm (4") Power handling capacity : 50 W RMS / 80 W max Tweeter : 20 mm (0,8") tweeter Sensitivity : 90 dB (1W/1m) Magnet size : 80 mm (3,15") Outer diameter of woofer : 100 mm (4") Installation depth : 50 mm ( 2") Mounting hole : 98 mm (3,85") Crossover : Box filter LP: 12 dB & HP: 12 dB slope What would you suggest as the ultimate front 4? speaker? I figured the Alpine or DLS would be the best. Maybe JL? For the rears should I just duplicate the rears in the back or perhaps go for:- 4?x10? rears Audiobahn AS41Q 4x10 2-Way 200W Car Speakers UK NEW HYPERLINK "http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=9717633720&rd=1&sspage name=STRK%3AMEWA%3AIT&rd=1"http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&i tem=9717633720&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1 Brand: Audiobahn Condition: New Size: 4 x 10 Inch Sensitivity: 93dB Frequency Response: 50Hz-20kHz RMS Power Handling: 100 Watts Peak Power Handling: 200 Watts Impedance: 4 Ohm Magnet Weight: 18 Oz Crossover Included: No Cone Material: Black Carbon Injection Tweeter Material: Silk Dome Includes Grills: Yes Anyone with experience of using high quality replacement speakers would be useful. I need to know what to order for front and back. I am also going for Kicker 8? subwoofer for the lockup box with a separate amp. I looked at a Kenwood combined amp and subwoofer but the sound quality is not as good. Thanks Chris Vin 5255 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.392 / Virus Database: 268.5.3/331 - Release Date: 03/05/2006 [Non-text portions of this message have been removed] ------------------------ Yahoo! Groups Sponsor --------------------~--> Everything you need is one?click away.? Make Yahoo! your home page?now. http://us.click.yahoo.com/AHchtC/4FxNAA/yQLSAA/HliolB/TM --------------------------------------------------------------------~-> DOC UK Website: www.deloreans.co.uk Unsubscribe: doc-uk-unsubscribe@xxxxxxxxxxxxxxx ** Unless otherwise stated, all messages posted to the group are assumed public and may be printed in the club magazine ** Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/doc-uk/ <*> To unsubscribe from this group, send an email to: doc-uk-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/